Java Software Engineering

James Gosling

See also Java Programming Language, Java Glossary, Java Bibliography, Java Reference materials

James Arthur Gosling, often referred to as “Dr. Java”, OC (born May 19, 1955) is a Canadian computer scientist, best known as the founder and lead designer behind the Java programming language.[3]

James Gosling 2008.jpg
BornJames Gosling
May 19, 1955 (age 65)
CalgaryAlberta, Canada
Alma materUniversity of Calgary
(BSc, 1977)
Carnegie Mellon University
(MAPhD, 1983)
Known forJava (programming language)
TitleDr. Java
AwardsOfficer of the Order of CanadaIEEE John von Neumann Medal The Economist Innovation AwardNAE Foreign Member
Scientific career
InstitutionsSun MicrosystemsOracle CorporationGoogleLiquid Robotics[1]Amazon Web Services
ThesisAlgebraic Constraints (1983)
Doctoral advisorBob Sproull and Raj Reddy[2

Early life

James Gosling received a Bachelor of Science from the University of Calgary [4] and his M.A. and Ph.D. from Carnegie Mellon University, all in computer science.[2][5][6] He wrote a version of Emacs called Gosling Emacs (Gosmacs) while working toward his doctorate. He built a multi-processor version of Unix for a 16-way computer system[7] while at Carnegie Mellon University, before joining Sun Microsystems. He also developed several compilers and mail systems there.

Career & contributions

Gosling was with Sun Microsystems between 1984 and 2010 (26 years). At Sun he invented an early Unix windowing system called NeWS, which became a lesser-used alternative to the still used X Window, because Sun did not give it an open source license.[citation needed]

He is known as the father of the Java programming language.[8][9] He got the idea for the Java VM while writing a program to port software from a PERQ by translating Perq Q-Code to VAX assembler and emulating the hardware. He is generally credited with having invented the Java programming language in 1994.[10][11][12] He created the original design of Java and implemented the language’s original compiler and virtual machine.[13] Gosling traces the origins of the approach to his early graduate student days, when he created a p-code virtual machine for the lab’s DEC VAX computer, so that his professor could run programs written in UCSD Pascal. In the work leading to Java at Sun, he saw that architecture-neutral execution for widely distributed programs could be achieved by implementing a similar philosophy: always program for the same virtual machine.[14] Another contribution of Gosling’s was co-writing the “bundle” program, known as “shar”, a utility thoroughly detailed in Brian Kernighan and Rob Pike‘s book The Unix Programming Environment.[15]

He left Sun Microsystems on April 2, 2010, after it was acquired by the Oracle Corporation,[8] citing reductions in pay, status, and decision-making ability, along with change of role and ethical challenges.[16] He has since taken a very critical stance towards Oracle in interviews, noting that “during the integration meetings between Sun and Oracle, where we were being grilled about the patent situation between Sun and Google, we could see the Oracle lawyer’s eyes sparkle.”[9] He clarified his position during the Oracle v. Google trial over Android: “While I have differences with Oracle, in this case they are in the right. Google totally slimed Sun. We were all really disturbed, even Jonathan [Schwartz]: he just decided to put on a happy face and tried to turn lemons into lemonade, which annoyed a lot of folks at Sun.”[17] However, he approved of the court’s ruling that APIs should not be copyrightable.[18]

In March 2011, Gosling joined Google.[19] Six months later, he followed his colleague Bill Vass and joined a startup called Liquid Robotics.[1] In late 2016, Liquid Robotics was acquired by Boeing.[20] Following the acquisition, Gosling left Liquid Robotics to work at Amazon Web Services as Distinguished Engineer in May 2017.[21]

He is an advisor at the Scala company Lightbend,[22] Independent Director at Jelastic,[23] and Strategic Advisor for Eucalyptus,[24] and is a board member of DIRTT Environmental Solutions.[25]

He is known for his love of proving “the unknown”[clarification needed] and has noted but later clarified to be untrue that his favorite irrational number is √2. He has a framed picture of the first 1,000 digits of √2 in his office.[26]


For his achievement, the National Academy of Engineering in the United States elected him as a Foreign Associate member.[27]


  • Ken Arnold, James Gosling, David Holmes, The Java Programming Language, Fourth Edition, Addison-Wesley Professional, 2005, ISBN 0-321-34980-6
  • James Gosling, Bill JoyGuy L. Steele Jr.Gilad BrachaThe Java Language Specification, Third Edition, Addison-Wesley Professional, 2005, ISBN 0-321-24678-0
  • Ken Arnold, James Gosling, David Holmes, The Java Programming Language, Third Edition, Addison-Wesley Professional, 2000, ISBN 0-201-70433-1
  • James Gosling, Bill Joy, Guy L. Steele Jr., Gilad Bracha, The Java Language Specification, Second Edition, Addison-Wesley, 2000, ISBN 0-201-31008-2
  • Gregory Bollella (Editor), Benjamin Brosgol, James Gosling, Peter Dibble, Steve Furr, David Hardin, Mark Turnbull, The Real-Time Specification for Java, Addison Wesley Longman, 2000, ISBN 0-201-70323-8
  • Ken Arnold, James Gosling, The Java programming language Second Edition, Addison-Wesley, 1997, ISBN 0-201-31006-6
  • Ken Arnold, James Gosling, The Java programming language, Addison-Wesley, 1996, ISBN 0-201-63455-4
  • James Gosling, Bill Joy, Guy L. Steele Jr., The Java Language Specification, Addison Wesley Publishing Company, 1996, ISBN 0-201-63451-1
  • James Gosling, Frank Yellin, The Java Team, The Java Application Programming Interface, Volume 2: Window Toolkit and Applets, Addison-Wesley, 1996, ISBN 0-201-63459-7
  • James Gosling, Frank Yellin, The Java Team, The Java Application Programming Interface, Volume 1: Core Packages, Addison-Wesley, 1996, ISBN 0-201-63453-8
  • James Gosling, Henry McGilton, The Java language Environment: A white paperSun Microsystems, 1996
  • James Gosling, David S. H. Rosenthal, Michelle J. Arden, The NeWS Book : An Introduction to the Network/Extensible Window System (Sun Technical Reference Library), Springer, 1989, ISBN 0-387-96915-2

See also

Wikimedia Commons has media related to James Gosling.


  1. a b I’ve moved again : On a New Road. Retrieved on 2016-05-17.
  2. a b James Gosling at the Mathematics Genealogy Project
  3. ^ “James Gosling – Computing History” Retrieved 2017-10-09.
  4. ^ “Archived copy”. Archived from the original on 2015-06-01. Retrieved 2015-05-13.
  5. ^ Gosling, James (1983). Algebraic Constraints (PhD thesis). Carnegie Mellon University. ProQuest 303133100.
  6. ^ Phd Awards By Advisor. Retrieved on 2013-07-17.
  7. ^ James Gosling mentioned a multiprocessor Unix in his statement during the US vs Microsoft Antitrust DOJ trial in 1998 “DOJ/Antitrust”Statement in MS Antitrust case. US DOJ. Retrieved 1 February 2007.
  8. a b Guevin, Jennifer. “Java co-creator James Gosling leaves Oracle”CNET. Retrieved 13 June 2020.
  9. a b Shankland, Stephen. (2011-03-28) Java founder James Gosling joins Google. CNET Retrieved on 2012-02-21.
  10. ^ Allman, E. (2004). “Interview: A Conversation with James Gosling”Queue2(5): 24. doi:10.1145/1016998.1017013.
  11. ^ Gosling, J. (1997). “The feel of Java”. Computer30 (6): 53–57. doi:10.1109/2.587548.
  12. ^ “Sun Labs-The First Five Years: The First Fifty Technical Reports. A Commemorative Issue”Ching-Chih Chang, Amy Hall, Jeanie Treichel. Sun Microsystems, Inc. 1998. Retrieved 2010-02-07.
  13. ^ Gosling, James (2004-08-31). “A Conversation with James Gosling”ACM Queue. ACM. Retrieved 2014-07-03. At Sun he is best known for creating the original design of Java and implementing its original compiler and virtual machine.
  14. ^ McMillan, W.W. (2011). “The soul of the virtual machine: Java’s abIlIty to run on many dIfferent kInds of computers grew out of software devised decades before”. IEEE Spectrum48 (7): 44–48. doi:10.1109/MSPEC.2011.5910448S2CID 40545952.
  15. ^ Kernighan, Brian W; Pike, Rob (1984). The Unix Programming Environment. Prentice Hall. pp. 97-100ISBN 0-13-937681-X.
  16. ^ Darryl K. Taft. (2010-09-22) Java Creator James Gosling: Why I Quit Oracle.
  17. ^ My attitude on Oracle v Google. Retrieved on 2016-05-17.
  18. ^ “Meltdown Averted” Retrieved 2017-03-13.
  19. ^ Next Step on the Road. Retrieved on 2016-05-17.
  20. ^ “Boeing to Acquire Liquid Robotics to Enhance Autonomous Seabed-to-Space Information Services”. December 6, 2016.
  21. ^ Darrow, Barb (May 23, 2017). “Legendary Techie James Gosling Joins Amazon Web Services” Retrieved 23 March 2018.
  22. ^ Typesafe — Company: Team. Retrieved on 2012-02-21.
  23. ^ James Gosling and Bruno Souza Join Jelastic as Advisers. Retrieved on 2014-11-24.
  24. ^ Eucalyptus Archived 2013-04-25 at the Wayback Machine. Retrieved on 2013-04-22
  25. ^ “James Gosling”DIRTT Environmental Solutions Ltd.
  26. ^ UserGroupsatGoogle (29 November 2010). “James Gosling on Apple, Apache, Google, Oracle and the Future of Java”YouTube. Retrieved 20 January 2018.
  27. ^ “NAE Members Directory – Dr. James Arthur Gosling”NAE. Retrieved March 29, 2011.
  28. ^ The 2002 Economist Innovation Award Winner Archived 2012-04-22 at the Wayback Machine.
  29. ^ “Flame Award” 6 December 2011. Retrieved 20 January 2018.
  30. ^ “Governor”. Archived from the original on February 7, 2008. Retrieved August 28, 2016.. February 20, 2007
  31. ^ ACM Names Fellows for Computing Advances that Are Transforming Science and Society Archived 2014-07-22 at the Wayback MachineAssociation for Computing Machinery, accessed 2013-12-10.
  32. ^ “IEEE JOHN VON NEUMANN MEDAL : RECIPIENTS” (PDF). Retrieved 20 January 2018.
  33. ^ Computer History Museum names James Gosling a 2019 Fellow



Fair Use Sources:

Artificial Intelligence Cloud Data Science - Big Data Hardware and Electronics History Networking Operating Systems Software Engineering

Timeline of the History of Computers

Return to History or This Year in History

c. 2500 BC – Sumerian Abacus

c. 700 BC – Scytale

c. 150 BC – Antikythera Mechanism

c. 60 – Programmable Robot

c. 850 – On Deciphering Cryptographic Messages

c. 1470 – Cipher Disk

1613 – First Recorded Use of the Word Computer

1621 – Slide Rule

1703 – Binary Arithmetic

1758 – Human Computers Predict Halley’s Comet

1770 – The “Mechanical Turk”

1792 – Optical Telegraph

1801 – The Jacquard Loom

1822 – The Difference Engine

1833 – Michael Faraday discovered silver sulfide became a better conductor when heated

1836 – Electrical Telegraph

1843 – Ada Lovelace Writes a Computer Program

1843 – Fax Machine Patented

1843 – Edgar Allan Poe’s “The Gold-Bug”

1849 to early 1900s – Silicon Valley After the Gold Rush

1851 – Thomas Arithmometer

1854 – Boolean Algebra

1864 – First Electromagnetic Spam Message

1870 – Mitsubishi founded

1874 – Baudot Code

1874 – Semiconductor Diode conceived of

1876 – Ericsson Corporation founded in Sweden

1885 – Stanford University

1885 – William Burroughs’ adding machine

1890 – Herman Hollerith Tabulating the US Census

1890 – Toshiba founded in Japan

1891 – Strowger Step-by-Step Switch

1898 – Nippon Electric Limited Partnership – NEC Corporation founded in Japan

1890s to 1930s – Radio Engineering

Early 1900s – Electrical Engineering

1904 – “Diode” or Two-Element Amplifier actually invented

1904 – Three-Element Amplifier or “Triode”

1906 – Vacuum Tube or “Audion”

1907 – Lee DeForest coins the term “radio” to refer to wireless transmission when he formed his DeForest Radio Telephone Company

1909 – Charles Herrold in San Jose started first radio station in USA with regularly scheduled programming, including songs, using an arc transmitter of his own design. Herrold was one of Stanford’s earliest students and founded his own College of Wireless and Engineering in San Jose

1910 – Radio Broadcasting business pioneered by Lee DeForest with broadcast from New York of a live performance by Italian tenor Enrico Caruso

1910 – Hitachi founded in Japan

1912 – Sharp Corporation founded in Japan and takes its name from one of its founder’s first inventions, the Ever-Sharp mechanical pencil

1914 – Floating-Point Numbers

1917 – Vernam Cipher

1918 – Panasonic, then Matsushita Electric, founded in Japan

1920 – Rossum’s Universal Robots

1927 – Fritz Lang’s Metropolis

1927 – First LED

1928 – Electronic Speech Synthesis

1930 – The Enigma Machine

1931 – Differential Analyzer

1935 – Fujitsu founded as Fuji Telecommunications Equipment Manufacturing in Japan. Fujitsu is the second oldest IT company after IBM and before Hewlett-Packard

1936 – Church-Turing Thesis

1939 – Hewlett-Packard founded in a one-car garage in Palo Alto, California by Bill Hewlett and David Packard

1939 – Toshiba founded in Japan

1941Z3 Computer

1942Atanasoff-Berry Computer

1942 – Isaac Asimov’s Three Laws of Robotics

1942Seiko Corporation founded in Japan



1944Delay Line Memory

1944Binary-Coded Decimal

1945Vannevar Bush‘s “As We May Think

1945EDVAC First Draft Report – The von Neumann architecture

1946 – Trackball

1946 – Williams Tube Random Access Memory

1947 – Actual Bug Found – First “debugging”

1947 – William Shockley’s Silicon Transistor

1948 – The Bit – Binary Digit 0 or 1

1948 – Curta Calculator

1948 – Manchester SSEM

1949 – Whirlwind Computer

1950 – Error-Correcting Codes (ECC)

1951 – Turing Test of Artificial Intelligence (AI)

1951 – Magnetic Tape Used for Computers

1951 – Core Memory

1951 – Microprogramming

1952 – Computer Speech Recognition

1953 – First Transistorized Computer

1955 – Artificial Intelligence (AI) Coined

1955 – Computer Proves Mathematical Theorem

1956 – First Disk Storage Unit

1956 – The Byte

1956 – Robby the Robot from Forbidden Planet

1957 – FORTRAN Programming Language

1957 – First Digital Image

1958 – The Bell 101 Modem

1958 – SAGE Computer Operational

1959 – IBM 1401 Computer

1959 – DEC PDP-1

1959 – Quicksort Algorithm

1959 – SABRE Airline Reservation System

1960 – COBOL Programming Language

1960 – Recommended Standard 232 (RS-232)

1961 – ANITA Electronic Calculator

1961 – Unimate – First Mass-Produced Robot

1961 – Time-Sharing – The Original “Cloud Computing

1961 – Shinshu Seiki Company founded in Japan (now called Seiko Epson Corporation) as a subsidiary of Seiko to supply precision parts for Seiko watches.

1962 – Spacewar! Video Game

1962 – Virtual Memory

1962 – Digital Long Distance Telephone Calls

1963 – Sketchpad Interactive Computer Graphics

1963 – ASCII Character Encoding

1963 – Seiko Corporation in Japan developed world’s first portable quartz timer (Seiko QC-951)

1964 – RAND Tablet Computer

1964 – Teletype Model 33 ASR

1964 – IBM System/360 Mainframe Computer

1964 – BASIC Programming Language

1965 – First Liquid-Crystal Display (LCD)

1965 – Fiber Optics – Optical-Fiber

1965 – DENDRAL Artificial Intelligence (AI) Research Project

1965 – ELIZA – The First “Chatbot” – 1965

1965 – Touchscreen

1966 – Star Trek Premieres

1966 – Dynamic RAM

1966 – Linear predictive coding (LPC) proposed by Fumitada Itakura of Nagoya University and Shuzo Saito of Nippon Telegraph and Telephone (NTT).[71]

1967 – Object-Oriented Programming

1967 – First ATM Machine

1967 – Head-Mounted Display

1967 – Programming for Children

1967 – The Mouse

1968 – Carterfone Decision

1968 – Software Engineering

1968 – HAL 9000 Computer from 2001: A Space Odyssey

1968 – First “Spacecraft” “Guided by Computer”

1968 – Cyberspace Coined—and Re-Coined

1968 – Mother of All Demos

1968 – Dot Matrix Printer – Shinshu Seiki (now called Seiko Epson Corporation) launched the world’s first mini-printer, the EP-101 (“EP” for Electronic Printer,) which was soon incorporated into many calculators

1968 – Interface Message Processor (IMP)

1969 – ARPANET / Internet

1969 – Digital Imaging

1969 – Network Working Group Request for Comments (RFC): 1

1969 – Utility Computing – Early “Cloud Computing

1969 – Perceptrons Book – Dark Ages of Neural Networks Artificial Intelligence (AI)

1969 – UNIX Operating System

1969 – Seiko Epson Corporation in Japan developed world’s first quartz watch timepiece (Seiko Quartz Astron 35SQ)

1970 – Fair Credit Reporting Act

1970 – Relational Databases

1970 – Floppy Disk

1971 – Laser Printer

1971 – NP-Completeness

1971 – @Mail Electronic Mail

1971 – First Microprocessor – General-Purpose CPU – “Computer on a Chip”

1971 – First Wireless Network

1972 – C Programming Language

1972 – Cray Research Supercomputers – High-Performance Computing (HPC)

1972 – Game of Life – Early Artificial Intelligence (AI) Research

1972 – HP-35 Calculator

1972 – Pong Game from Atari – Nolan Bushnell

1973 – First Cell Phone Call

1973 – Danny Cohen first demonstrated a form of packet voice as part of a flight simulator application, which operated across the early ARPANET.[69][70]

1973 – Xerox Alto from Xerox Palo Alto Research Center (PARC)

1973 – Sharp Corporation produced the first LCD calculator

1974 – Data Encryption Standard (DES)

1974 – The Institute of Electrical and Electronics Engineers (IEEE) publishes a paper entitled “A Protocol for Packet Network Interconnection”.[82]

1974 – Network Voice Protocol (NVP) tested over ARPANET in August 1974, carrying barely audible 16 kpbs CVSD encoded voice.[71]

1974 – The first successful real-time conversation over ARPANET achieved using 2.4 kpbs LPC, between Culler-Harrison Incorporated in Goleta, California, and MIT Lincoln Laboratory in Lexington, Massachusetts.[71]

1974 – First Personal Computer: The Altair 8800 Invented by MITS in Albuquerque, New Mexico

1975 – Colossal Cave Adventure – Text-based “Video” Game

1975 – The Shockwave Rider SciFi Book – A Prelude of the 21st Century Big Tech Police State

1975 – AI Medical Diagnosis – Artificial Intelligence in Medicine

1975 – BYTE Magazine

1975 – Homebrew Computer Club

1975 – The Mythical Man-Month

1975 – The name Epson was coined for the next generation of printers based on the EP-101 which was released to the public. (EPSON:E-P-SON: SON of Electronic Printer).[7] Epson America Inc. was established to sell printers for Shinshu Seiki Co.

1976 – Public Key Cryptography

1976 – Acer founded

1976 – Tandem NonStop

1976 – Dr. Dobb’s Journal

1977 – RSA Encryption

1977 – Apple II Computer

The TRS-80 Model I pictured alongside the Apple II and the Commodore PET 2001-8. These three computers constitute what Byte Magazine called the “1977 Trinity” of home computing.

1977 – Danny Cohen and Jon Postel of the USC Information Sciences Institute, and Vint Cerf of the Defense Advanced Research Projects Agency (DARPA), agree to separate IP from TCP, and create UDP for carrying real-time traffic.

1978 – First Internet Spam Message

1978 – France’s Minitel Videotext

1979 – Secret Sharing for Encryption

1979 – Dan Bricklin Invents VisiCalc Spreadsheet

1980 – Timex Sinclair ZX80 Computer

1980 – Flash Memory

1980 – RISC Microprocessors – Reduced Instruction Set Computer CPUs

1980 – Commercially Available Ethernet Invented by Robert Metcalfe of 3Com

1980 – Usenet

1981 – IBM Personal Computer – IBM PC

1981 – Simple Mail Transfer Protocol (SMTP) Email

1981 – Japan’s Fifth Generation Computer SystemsJapan

1982 – Sun Microsystems was founded on February 24, 1982.[2]

1982 – AutoCAD

1982 – First Commercial UNIX Workstation

1982 – PostScript

1982 – Microsoft and the IBM PC Clones

1982 – First CGI Sequence in Feature Film – Star Trek II: The Wrath of Khan

1982 – National Geographic Moves the Pyramids – Precursor to Photoshop

1982 – Secure Multi-Party Computation

1982 – TRON Movie

1982 – Home Computer Named Machine of the Year by Time Magazine

1983 – The Qubit – Quantum Computers

1983 – WarGames

1983 – 3-D Printing

1983 – Computerization of the Local Telephone Network

1983 – First Laptop

1983 – MIDI Computer Music Interface

1983 – Microsoft Word

1983 – Nintendo Entertainment System – Video Games

1983 – Domain Name System (DNS)

1983 – IPv4 Flag Day – TCP/IP

1984 – Text-to-Speech (TTS)

1984 – Apple Macintosh

1984 – VPL Research, Inc. – Virtual Reality (VR)

1984 – Quantum Cryptography

1984 – Telebit TrailBlazer Modems Break 9600 bps

1984 – Verilog Language

1984 – Dell founded by Michael Dell

1984 – Cisco Systems was founded in December 1984

1985 – Connection Machine – Parallelization

1985 – First Computer-Generated TV Host – Max HeadroomCGI

1985 – Zero-Knowledge Mathematical Proofs

1985 – FCC Approves Unlicensed Wireless Spread Spectrum

1985 – NSFNET National Science Foundation “Internet”

1985 – Desktop Publishing – with Macintosh, Aldus PageMaker, LaserJet, LaserWriter and PostScript

1985 – Field-Programmable Gate Array (FPGA)

1985 – GNU Manifesto from Richard Stallman

1985 – AFIS Stops a Serial Killer – Automated Fingerprint Identification System

1986 – Software Bug Fatalities

1986 – Pixar Animation Studios

1986 – D-Link Corporation founded in Taipei, Taiwan

1987 – Digital Video Editing

1987 – GIF – Graphics Interchange Format

1988 – MPEG – Moving Picture Experts Group – Coding-Compressing Audio-Video

1988 – CD-ROM

1988 – Morris Worm Internet Computer Virus

1988 – Linksys founded

1989 – World Wide Web-HTML-HTTP Invented by Tim Berners-Lee

1989 – Asus was founded in Taipei, Taiwan

1989 – SimCity Video Game

1989 – ISP Provides Internet Access to the Public

1990 – GPS Is Operational – Global Positioning System

1990 – Digital Money is Invented – DigiCash – Precursor to Bitcoin

1991 – Pretty Good Privacy (PGP)

1991 – DARPA’s Report “Computers at Risk: Safe Computing in the Information Age

1991 – Linux Kernel Operating System Invented by Linus Torvalds

1992 – Boston Dynamics Robotics Company Founded

1992 – JPEG – Joint Photographic Experts Group

1992 – First Mass-Market Web Browser NCSA Mosaic Invented by Marc Andreessen

1992 – Unicode Character Encoding

1993 – Apple Newton

1994 – First Banner Ad – Wired Magazine

1994 – RSA-129 Encryption Cracked

1995 – DVD

1995 – E-Commerce Startups – eBay, Amazon and DoubleClick Launched

1995 – AltaVista Web Search Engine

1995 – Gartner Hype Cycle

1996 – Universal Serial Bus (USB)

1996 – Juniper Networks founded

1997 – IBM Computer Is World Chess Champion

1997 – PalmPilot

1997 – E Ink

1998 – Diamond Rio MP3 Player

1998 – Google

1999 – Collaborative Software Development

1999 – Blog Is Coined

1999 – Napster P2P Music and File Sharing

2000 – USB Flash Drive

2000 – Sharp Corporation’s Mobile Communications Division created the world’s first commercial camera phone, the J-SH04, in Japan

2000 – Fortinet founded

2001 – Wikipedia

2001 – Apple iTunes

2001 – Advanced Encryption Standard (AES)

2001 – Quantum Computer Factors “15”

2002 – Home-Cleaning Robot

2003 – CAPTCHA

2004 – Product Tracking

2004 – Facebook

2004 – First International Meeting on Synthetic Biology

2005 – Video Game Enables Research into Real-World Pandemics

2006 – Apache Hadoop Makes Big Data Possible

2006 – Differential Privacy

2007 – Apple iPhone

2008 – Bitcoin

2010 – Air Force Builds Supercomputer with Gaming Consoles

2010 – Cyber Weapons

2011 – Smart Homes via the Internet of Things (IoT)

2011 – IBM Watson Wins Jeopardy!

2011 – World IPv6 Day

2011 – Social Media Enables the Arab Spring

2012 – DNA Data Storage

2013 – Algorithm Influences Prison Sentence

2013 – Subscription Software “Popularized”

2014 – Data Breaches

2014 – Over-the-Air Vehicle Software Updates

2015 – Google Releases TensorFlow

2016 – Augmented Reality Goes Mainstream

2016 – Computer Beats Master at Game of Go

~2050 -Hahahaha! – Artificial General Intelligence (AGI)

~9999 – The Limits of Computation?


Fair Use Sources:

History Java Software Engineering

Java Programming Language – Invented by James Gosling of Sun Microsystems – 1995 AD – Java language

See also Java Programming Language, Java Glossary, Java Bibliography, Java Reference materials, Timeline of the History of Computers

It is not to be confused with Javanese language (LOL Haha). Not to be confused with JavaScript.

May 23, 1995 – Sun Microsystems first announces Java at the SunWorld conference.

Java programming language logo.svg
ParadigmMulti-paradigmgenericobject-oriented (class-based), imperativereflective
Designed byJames Gosling
DeveloperOracle Corporation
First appearedMay 23, 1995; 25 years ago[1]
Stable releaseJava SE 16 / March 16, 2021; 12 days ago
Typing disciplineStatic, strong, safenominativemanifest
Filename, .class.jar
Influenced by
CLU,[2] Simula67,[2] LISP,[2] SmallTalk,[2] Ada 83C++,[3] C#,[4] Eiffel,[5] Mesa,[6] Modula-3,[7] Oberon,[8] Objective-C,[9] UCSD Pascal,[10][11] Object Pascal[12]
Ada 2005BeanShellC#Chapel,[13] ClojureECMAScriptFantomGambas,[14] GroovyHack,[15] HaxeJ#KotlinPHPPythonScalaSeed7ValaJavaScript
 Java Programming at Wikibooks

Java is a class-basedobject-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let application developers write once, run anywhere (WORA),[16] meaning that compiled Java code can run on all platforms that support Java without the need for recompilation.[17] Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture. The syntax of Java is similar to C and C++, but has fewer low-level facilities than either of them. The Java runtime provides dynamic capabilities (such as reflection and runtime code modification) that are typically not available in traditional compiled languages. As of 2019, Java was one of the most popular programming languages in use according to GitHub,[18][19] particularly for client-server web applications, with a reported 9 million developers.[20]” (WP)

Java was originally developed by James Gosling at Sun Microsystems (which has since been acquired by Oracle) and released in 1995 as a core component of Sun Microsystems’ Java platform. The original and reference implementation Java compilers, virtual machines, and class libraries were originally released by Sun under proprietary licenses. As of May 2007, in compliance with the specifications of the Java Community Process, Sun had relicensed most of its Java technologies under the GNU General Public License. Oracle offers its own HotSpot Java Virtual Machine, however the official reference implementation is the OpenJDK JVM which is free open source software and used by most developers and is the default JVM for almost all Linux distributions.

As of March 2021, the latest version is Java 16, with Java 11, a currently supported long-term support (LTS) version, released on September 25, 2018. Oracle released the last zero-cost public update for the legacy version Java 8 LTS in January 2019 for commercial use, although it will otherwise still support Java 8 with public updates for personal use indefinitely. Other vendors have begun to offer zero-cost builds of OpenJDK 8 and 11 that are still receiving security and other upgrades.

Oracle (and others) highly recommend uninstalling outdated versions of Java because of serious risks due to unresolved security issues.[21] Since Java 9, 10, 12, 13, 14, and 15 are no longer supported, Oracle advises its users to immediately transition to the latest version (currently Java 16) or an LTS release.


See also: Java (software platform) § History Duke, the Java mascot

James Gosling, the creator of Java, in 2008

The TIOBE programming language popularity index graph from 2002 to 2018. Java was steadily on the top from mid-2015 to early 2020.

James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in June 1991.[22] Java was originally designed for interactive television, but it was too advanced for the digital cable television industry at the time.[23] The language was initially called Oak after an oak tree that stood outside Gosling’s office. Later the project went by the name Green and was finally renamed Java, from Java coffee, a type of coffee from Indonesia.[24] Gosling designed Java with a C/C++-style syntax that system and application programmers would find familiar.[25]

Sun Microsystems released the first public implementation as Java 1.0 in 1996.[26] It promised Write Once, Run Anywhere (WORA) functionality, providing no-cost run-times on popular platforms. Fairly secure and featuring configurable security, it allowed network- and file-access restrictions. Major web browsers soon incorporated the ability to run Java applets within web pages, and Java quickly became popular. The Java 1.0 compiler was re-written in Java by Arthur van Hoff to comply strictly with the Java 1.0 language specification.[27] With the advent of Java 2 (released initially as J2SE 1.2 in December 1998 – 1999), new versions had multiple configurations built for different types of platforms. J2EE included technologies and APIs for enterprise applications typically run in server environments, while J2ME featured APIs optimized for mobile applications. The desktop version was renamed J2SE. In 2006, for marketing purposes, Sun renamed new J2 versions as Java EEJava ME, and Java SE, respectively.

In 1997, Sun Microsystems approached the ISO/IEC JTC 1 standards body and later the Ecma International to formalize Java, but it soon withdrew from the process.[28][29][30] Java remains a de facto standard, controlled through the Java Community Process.[31] At one time, Sun made most of its Java implementations available without charge, despite their proprietary software status. Sun generated revenue from Java through the selling of licenses for specialized products such as the Java Enterprise System.

On November 13, 2006, Sun released much of its Java virtual machine (JVM) as free and open-source software (FOSS), under the terms of the GNU General Public License (GPL). On May 8, 2007, Sun finished the process, making all of its JVM’s core code available under free software/open-source distribution terms, aside from a small portion of code to which Sun did not hold the copyright.[32]

Sun’s vice-president Rich Green said that Sun’s ideal role with regard to Java was as an evangelist.[33] Following Oracle Corporation‘s acquisition of Sun Microsystems in 2009–10, Oracle has described itself as the steward of Java technology with a relentless commitment to fostering a community of participation and transparency.[34] This did not prevent Oracle from filing a lawsuit against Google shortly after that for using Java inside the Android SDK (see the Android section).

On April 2, 2010, James Gosling resigned from Oracle.[35]

In January 2016, Oracle announced that Java run-time environments based on JDK 9 will discontinue the browser plugin.[36]

Java software runs on everything from laptops to data centersgame consoles to scientific supercomputers.[37]

Java’s Origins

“The seeds of Java were planted in 1990 by Sun Microsystems patriarch and chief researcher Bill Joy. At the time, Sun was competing in a relatively small workstation market, while Microsoft was beginning its domination of the more mainstream, Intel-based PC world. When Sun missed the boat on the PC revolution, Joy retreated to Aspen, Colorado, to work on advanced research. He was committed to the idea of accomplishing complex tasks with simple software and founded the aptly named Sun Aspen Smallworks.” (B086L2NYWR)

“Of the original members of the small team of programmers assembled in Aspen, James Gosling will be remembered as the father of Java. Gosling first made a name for himself in the early 80s as the author of Gosling Emacs, the first version of the popular Emacs editor that was written in C and ran under Unix. Gosling Emacs became popular but was soon eclipsed by a free version, GNU Emacs, written by Emacs’s original designer. By that time, Gosling had moved on to design Sun’s NeWS, which briefly contended with the X Window System for control of the Unix GUI desktop in 1987. Although some people would argue that NeWS was superior to X, NeWS lost because Sun kept it proprietary and didn’t publish source code, while the primary developers of X formed the X Consortium and took the opposite approach.” (B086L2NYWR)

“Designing NeWS taught Gosling the power of integrating an expressive language with a network-aware windowing GUI. It also taught Sun that the internet programming community will ultimately refuse to accept proprietary standards, no matter how good they may be. The seeds of Java’s licensing scheme and open (if not quite “open source”) code were sown by NeWS’s failure. Gosling brought what he had learned to Bill Joy’s nascent Aspen project. In 1992, work on the project led to the founding of the Sun subsidiary FirstPerson, Inc. Its mission was to lead Sun into the world of consumer electronics.” (B086L2NYWR)

“The FirstPerson team worked on developing software for information appliances, such as cellular phones and personal digital assistants (PDAs). The goal was to enable the transfer of information and real-time applications over cheap infrared and traditional packet-based networks. Memory and bandwidth limitations dictated small, efficient code. The nature of the applications also demanded they be safe and robust. Gosling and his teammates began programming in C++, but they soon found themselves confounded by a language that was too complex, unwieldy, and insecure for the task. They decided to start from scratch, and Gosling began working on something he dubbed “C++ minus minus.””(B086L2NYWR)

“With the foundering of the Apple Newton (Apple’s earliest handheld computer), it became apparent that the PDA’s ship had not yet come in, so Sun shifted FirstPerson’s efforts to interactive TV (ITV). The programming language of choice for ITV set-top boxes was to be the near ancestor of Java, a language called Oak. Even with its elegance and ability to provide safe interactivity, Oak could not salvage the lost cause of ITV at that time. Customers didn’t want it, and Sun soon abandoned the concept.” (B086L2NYWR)

“At that time, Joy and Gosling got together to decide on a new strategy for their innovative language. It was 1993, and the explosion of interest in the web presented a new opportunity. Oak was small, safe, architecture-independent, and object-oriented. As it happens, these are also some of the requirements for a universal, internet-savvy programming language. Sun quickly changed focus, and, with a little retooling, Oak became Java.” (B086L2NYWR)

Java Growing Up

“It wouldn’t be an overstatement to say that Java (and its developer-focused bundle, the Java Development Kit, or JDK) caught on like wildfire. Even before its first official release when Java was still a nonproduct, nearly every major industry player had jumped on the Java bandwagon. Java licensees included Microsoft, Intel, IBM, and virtually all major hardware and software vendors. However, even with all this support, Java took a lot of knocks and experienced some growing pains during its first few years.” (B086L2NYWR)

“A series of breach of contract and antitrust lawsuits between Sun and Microsoft over the distribution of Java and its use in Internet Explorer hampered its deployment on the world’s most common desktop operating system — Windows. Microsoft’s involvement with Java also become one focus of a larger federal lawsuit over serious anticompetitive practices at the company, with court testimony revealing concerted efforts by the software giant to undermine Java by introducing incompatibilities in its version of the language. Meanwhile, Microsoft introduced its own Java-derived language called C# (C-sharp) as part of its .NET initiative and dropped Java from inclusion in Windows. C# has gone on to become a very good language in its own right, enjoying more innovation in recent years than has Java.” (B086L2NYWR)

“But Java continues to spread on a wide variety of platforms. As we begin looking at the Java architecture, you’ll see that much of what is exciting about Java comes from the self-contained, virtual machine environment in which Java applications run. Java was carefully designed so that this supporting architecture can be implemented either in software, for existing computer platforms, or in customized hardware. Hardware implementations of Java are used in some smart cards and other embedded systems. You can even buy “wearable” devices, such as rings and dog tags, that have Java interpreters embedded in them. Software implementations of Java are available for all modern computer platforms down to portable computing devices. Today, an offshoot of the Java platform is the basis for Google’s Android operating system that powers billions of phones and other mobile devices.” (B086L2NYWR)

“In 2010, Oracle corporation bought Sun Microsystems and became the steward of the Java language. In a somewhat rocky start to its tenure, Oracle sued Google over its use of the Java language in Android and lost. In July of 2011, Oracle released Java SE 7, a significant Java release including a new I/O package in 2017. Java 9 introduced modules to address some long-standing issues with the classpath and the growing size of the JDK itself. Java 9 also kicked off a rapid update process leading to Java 11 being the current version with long-term support. (More on these and other versions in “A Java Road Map”.) Oracle continues to lead Java development; however, they have also bifurcated the Java world by moving the main Java deployment environment to a costly commercial license and offering a free subsidiary OpenJDK option that retains the accessibility many developers love and expect.” (B086L2NYWR)


There were five primary goals in the creation of the Java language:[17]

  1. It must be simple, object-oriented, and familiar.
  2. It must be robust and secure.
  3. It must be architecture-neutral and portable.
  4. It must execute with high performance.
  5. It must be interpretedthreaded, and dynamic.


Main article: Java version history

As of September 2020, Java 8 and 11 are supported as Long Term Support (LTS) versions, and one later non-LTS version is supported.[38] Major release versions of Java, along with their release dates:

JDK Beta1995
JDK1.0January 23, 1996[39]
JDK 1.1February 19, 1997
J2SE 1.2December 8, 1998
J2SE 1.3May 8, 2000
J2SE 1.4February 6, 2002
J2SE 5.0September 30, 2004
Java SE 6December 11, 2006
Java SE 7July 28, 2011
Java SE 8March 18, 2014
Java SE 9September 21, 2017
Java SE 10March 20, 2018
Java SE 11September 25, 2018[40]
Java SE 12March 19, 2019
Java SE 13September 17, 2019
Java SE 14March 17, 2020
Java SE 15September 15, 2020[41]
Java SE 16March 16, 2021


See also: Free Java implementations § Class library

Java platform editions
Java CardJava ME (Micro)

Java SE (Standard)

Jakarta EE (Enterprise)

JavaFX (bundled in JRE from 8 to 10 but separately for JavaFX 1.x, 2.x and again since 11)

PersonalJava (Discontinued)

Sun has defined and supports four editions of Java targeting different application environments and segmented many of its APIs so that they belong to one of the platforms. The platforms are:

The classes in the Java APIs are organized into separate groups called packages. Each package contains a set of related interfaces, classes, subpackages and exceptions.

Sun also provided an edition called Personal Java that has been superseded by later, standards-based Java ME configuration-profile pairings.

Execution system

Java JVM and bytecode

Main articles: Java (software platform) and Java virtual machine

One design goal of Java is portability, which means that programs written for the Java platform must run similarly on any combination of hardware and operating system with adequate run time support. This is achieved by compiling the Java language code to an intermediate representation called Java bytecode, instead of directly to architecture-specific machine code. Java bytecode instructions are analogous to machine code, but they are intended to be executed by a virtual machine (VM) written specifically for the host hardware. End users commonly use a Java Runtime Environment (JRE) installed on their machine for standalone Java applications, or in a web browser for Java applets.

Standard libraries provide a generic way to access host-specific features such as graphics, threading, and networking.

The use of universal bytecode makes porting simple. However, the overhead of interpreting bytecode into machine instructions made interpreted programs almost always run more slowly than native executablesJust-in-time (JIT) compilers that compile byte-codes to machine code during runtime were introduced from an early stage. Java itself is platform-independent and is adapted to the particular platform it is to run on by a Java virtual machine (JVM) for it, which translates the Java bytecode into the platform’s machine language.[46]


Main article: Java performance

Programs written in Java have a reputation for being slower and requiring more memory than those written in C++ .[47][48] However, Java programs’ execution speed improved significantly with the introduction of just-in-time compilation in 1997/1998 for Java 1.1,[49] the addition of language features supporting better code analysis (such as inner classes, the StringBuilder class, optional assertions, etc.), and optimizations in the Java virtual machine, such as HotSpot becoming Sun’s default JVM in 2000. With Java 1.5, the performance was improved with the addition of the java.util.concurrent package, including lock free implementations of the ConcurrentMaps and other multi-core collections, and it was improved further with Java 1.6.


Some platforms offer direct hardware support for Java; there are micro controllers that can run Java bytecode in hardware instead of a software Java virtual machine,[50] and some ARM-based processors could have hardware support for executing Java bytecode through their Jazelle option, though support has mostly been dropped in current implementations of ARM.

Automatic memory management

Java uses an automatic garbage collector to manage memory in the object lifecycle. The programmer determines when objects are created, and the Java runtime is responsible for recovering the memory once objects are no longer in use. Once no references to an object remain, the unreachable memory becomes eligible to be freed automatically by the garbage collector. Something similar to a memory leak may still occur if a programmer’s code holds a reference to an object that is no longer needed, typically when objects that are no longer needed are stored in containers that are still in use. If methods for a non-existent object are called, a null pointer exception is thrown.[51][52]

One of the ideas behind Java’s automatic memory management model is that programmers can be spared the burden of having to perform manual memory management. In some languages, memory for the creation of objects is implicitly allocated on the stack or explicitly allocated and deallocated from the heap. In the latter case, the responsibility of managing memory resides with the programmer. If the program does not deallocate an object, a memory leak occurs. If the program attempts to access or deallocate memory that has already been deallocated, the result is undefined and difficult to predict, and the program is likely to become unstable or crash. This can be partially remedied by the use of smart pointers, but these add overhead and complexity. Note that garbage collection does not prevent logical memory leaks, i.e. those where the memory is still referenced but never used.

Garbage collection may happen at any time. Ideally, it will occur when a program is idle. It is guaranteed to be triggered if there is insufficient free memory on the heap to allocate a new object; this can cause a program to stall momentarily. Explicit memory management is not possible in Java.

Java does not support C/C++ style pointer arithmetic, where object addresses can be arithmetically manipulated (e.g. by adding or subtracting an offset). This allows the garbage collector to relocate referenced objects and ensures type safety and security.

As in C++ and some other object-oriented languages, variables of Java’s primitive data types are either stored directly in fields (for objects) or on the stack (for methods) rather than on the heap, as is commonly true for non-primitive data types (but see escape analysis). This was a conscious decision by Java’s designers for performance reasons.

Java contains multiple types of garbage collectors. Since Java 9, HotSpot uses the Garbage First Garbage Collector (G1GC) as the default.[53] However, there are also several other garbage collectors that can be used to manage the heap. For most applications in Java, G1GC is sufficient. Previously, the Parallel Garbage Collector was used in Java 8.

Having solved the memory management problem does not relieve the programmer of the burden of handling properly other kinds of resources, like network or database connections, file handles, etc., especially in the presence of exceptions.


Main article: Java syntax

Dependency graph of the Java Core classes (created with jdeps and Gephi)

The syntax of Java is largely influenced by C++ and C. Unlike C++, which combines the syntax for structured, generic, and object-oriented programming, Java was built almost exclusively as an object-oriented language.[17] All code is written inside classes, and every data item is an object, with the exception of the primitive data types, (i.e. integers, floating-point numbers, boolean values, and characters), which are not objects for performance reasons. Java reuses some popular aspects of C++ (such as the printf method).

Unlike C++, Java does not support operator overloading[54] or multiple inheritance for classes, though multiple inheritance is supported for interfaces.[55]

Java uses comments similar to those of C++. There are three different styles of comments: a single line style marked with two slashes (//), a multiple line style opened with /* and closed with */, and the Javadoc commenting style opened with /** and closed with */. The Javadoc style of commenting allows the user to run the Javadoc executable to create documentation for the program and can be read by some integrated development environments (IDEs) such as Eclipse to allow developers to access documentation within the IDE.

Hello world example

The traditional Hello world program can be written in Java as:[56]

public class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Prints the string to the console.

All source files must be named after the public class they contain, appending the suffix .java, for example, It must first be compiled into bytecode, using a Java compiler, producing a file with the .class suffix (HelloWorldApp.class, in this case). Only then can it be executed or launched. The Java source file may only contain one public class, but it can contain multiple classes with a non-public access modifier and any number of public inner classes. When the source file contains multiple classes, it is necessary to make one class (introduced by the class keyword) public (preceded by the public keyword) and name the source file with that public class name.

A class that is not declared public may be stored in any .java file. The compiler will generate a class file for each class defined in the source file. The name of the class file is the name of the class, with .class appended. For class file generation, anonymous classes are treated as if their name were the concatenation of the name of their enclosing class, a $, and an integer.

The keyword public denotes that a method can be called from code in other classes, or that a class may be used by classes outside the class hierarchy. The class hierarchy is related to the name of the directory in which the .java file is located. This is called an access level modifier. Other access level modifiers include the keywords private (a method that can only be accessed in the same class) and protected (which allows code from the same package to access). If a piece of code attempts to access private methods or protected methods, the JVM will throw a SecurityException

The keyword static[18] in front of a method indicates a static method, which is associated only with the class and not with any specific instance of that class. Only static methods can be invoked without a reference to an object. Static methods cannot access any class members that are not also static. Methods that are not designated static are instance methods and require a specific instance of a class to operate.

The keyword void indicates that the main method does not return any value to the caller. If a Java program is to exit with an error code, it must call System.exit() explicitly.

The method name main is not a keyword in the Java language. It is simply the name of the method the Java launcher calls to pass control to the program. Java classes that run in managed environments such as applets and Enterprise JavaBeans do not use or need a main() method. A Java program may contain multiple classes that have main methods, which means that the VM needs to be explicitly told which class to launch from.

The main method must accept an array of String objects. By convention, it is referenced as args although any other legal identifier name can be used. Since Java 5, the main method can also use variable arguments, in the form of public static void main(String... args), allowing the main method to be invoked with an arbitrary number of String arguments. The effect of this alternate declaration is semantically identical (to the args parameter which is still an array of String objects), but it allows an alternative syntax for creating and passing the array.

The Java launcher launches Java by loading a given class (specified on the command line or as an attribute in a JAR) and starting its public static void main(String[]) method. Stand-alone programs must declare this method explicitly. The String[] args parameter is an array of String objects containing any arguments passed to the class. The parameters to main are often passed by means of a command line.

Printing is part of a Java standard library: The System class defines a public static field called out. The out object is an instance of the PrintStream class and provides many methods for printing data to standard out, including println(String) which also appends a new line to the passed string.

The string "Hello World!" is automatically converted to a String object by the compiler.

Example with methods

// This is an example of a single line comment using two slashes

 * This is an example of a multiple line comment using the slash and asterisk.
 * This type of comment can be used to hold a lot of information or deactivate
 * code, but it is very important to remember to close the comment.

package fibsandlies;

import java.util.Map;
import java.util.HashMap;

 * This is an example of a Javadoc comment; Javadoc can compile documentation
 * from this text. Javadoc comments must immediately precede the class, method,
 * or field being documented.
 * @author Wikipedia Volunteers
public class FibCalculator extends Fibonacci implements Calculator {
    private static Map<Integer, Integer> memoized = new HashMap<>();

     * The main method written as follows is used by the JVM as a starting point
     * for the program.
    public static void main(String[] args) {
        memoized.put(1, 1);
        memoized.put(2, 1);
        System.out.println(fibonacci(12)); // Get the 12th Fibonacci number and print to console

     * An example of a method written in Java, wrapped in a class.
     * Given a non-negative number FIBINDEX, returns
     * the Nth Fibonacci number, where N equals FIBINDEX.
     * @param fibIndex The index of the Fibonacci number
     * @return the Fibonacci number
    public static int fibonacci(int fibIndex) {
        if (memoized.containsKey(fibIndex)) return memoized.get(fibIndex);
        else {
            int answer = fibonacci(fibIndex - 1) + fibonacci(fibIndex - 2);
            memoized.put(fibIndex, answer);
            return answer;

Special classes


Main article: Java applet

Java applets were programs that were embedded in other applications, typically in a Web page displayed in a web browser. The Java applet API is now deprecated since Java 8 in 2017.[57][58]


Main article: Java servlet

Java servlet technology provides Web developers with a simple, consistent mechanism for extending the functionality of a Web server and for accessing existing business systems. Servlets are server-side Java EE components that generate responses to requests from clients. Most of the time, this means generating HTML pages in response to HTTP requests, although there are a number of other standard servlet classes available, for example for WebSocket communication.

The Java servlet API has to some extent been superseded (but still used under the hood) by two standard Java technologies for web services:

Typical implementations of these APIs on Application Servers or Servlet Containers use a standard servlet for handling all interactions with the HTTP requests and responses that delegate to the web service methods for the actual business logic.

JavaServer Pages

Main article: JavaServer Pages

JavaServer Pages (JSP) are server-side Java EE components that generate responses, typically HTML pages, to HTTP requests from clients. JSPs embed Java code in an HTML page by using the special delimiters <% and %>. A JSP is compiled to a Java servlet, a Java application in its own right, the first time it is accessed. After that, the generated servlet creates the response.[59]

Swing application

Main article: Swing (Java)

Swing is a graphical user interface library for the Java SE platform. It is possible to specify a different look and feel through the pluggable look and feel system of Swing. Clones of WindowsGTK+, and Motif are supplied by Sun. Apple also provides an Aqua look and feel for macOS. Where prior implementations of these looks and feels may have been considered lacking, Swing in Java SE 6 addresses this problem by using more native GUI widget drawing routines of the underlying platforms.[60]

JavaFX application

Main article: JavaFX

JavaFX is a software platform for creating and delivering desktop applications, as well as rich web applications that can run across a wide variety of devices. JavaFX is intended to replace Swing as the standard GUI library for Java SE, but since JDK 11 JavaFX has not been in the core JDK and instead in a separate module.[61] JavaFX has support for desktop computers and web browsers on Microsoft WindowsLinux, and macOS. JavaFX does not have support for native OS look and feels.[62]


Main article: Generics in Java

In 2004, generics were added to the Java language, as part of J2SE 5.0. Prior to the introduction of generics, each variable declaration had to be of a specific type. For container classes, for example, this is a problem because there is no easy way to create a container that accepts only specific types of objects. Either the container operates on all subtypes of a class or interface, usually Object, or a different container class has to be created for each contained class. Generics allow compile-time type checking without having to create many container classes, each containing almost identical code. In addition to enabling more efficient code, certain runtime exceptions are prevented from occurring, by issuing compile-time errors. If Java prevented all runtime type errors (ClassCastExceptions) from occurring, it would be type safe.

In 2016, the type system of Java was proven unsound.[63]


Main article: Criticism of Java

Criticisms directed at Java include the implementation of generics,[64] speed,[65] the handling of unsigned numbers,[66] the implementation of floating-point arithmetic,[67] and a history of security vulnerabilities in the primary Java VM implementation HotSpot.[68]

Class libraries

Main article: Java Class Library

The Java Class Library is the standard library, developed to support application development in Java. It is controlled by Oracle in cooperation with others through the Java Community Process program.[69] Companies or individuals participating in this process can influence the design and development of the APIs. This process has been a subject of controversy during the 2010s.[70] The class library contains features such as:


Main article: Javadoc

Javadoc is a comprehensive documentation system, created by Sun Microsystems. It provides developers with an organized system for documenting their code. Javadoc comments have an extra asterisk at the beginning, i.e. the delimiters are /** and */, whereas the normal multi-line comments in Java are set off with the delimiters /* and */, and single-line comments start off the line with //.[74]


See also: Free Java implementations

Oracle Corporation is the current owner of the official implementation of the Java SE platform, following their acquisition of Sun Microsystems on January 27, 2010. This implementation is based on the original implementation of Java by Sun. The Oracle implementation is available for Microsoft Windows (still works for XP, while only later versions are currently officially supported), macOSLinux, and Solaris. Because Java lacks any formal standardization recognized by Ecma International, ISO/IEC, ANSI, or other third-party standards organizations, the Oracle implementation is the de facto standard.

The Oracle implementation is packaged into two different distributions: The Java Runtime Environment (JRE) which contains the parts of the Java SE platform required to run Java programs and is intended for end users, and the Java Development Kit (JDK), which is intended for software developers and includes development tools such as the Java compilerJavadocJar, and a debugger. Oracle has also released GraalVM, a high performance Java dynamic compiler and interpreter.

OpenJDK is another notable Java SE implementation that is licensed under the GNU GPL. The implementation started when Sun began releasing the Java source code under the GPL. As of Java SE 7, OpenJDK is the official Java reference implementation.

The goal of Java is to make all implementations of Java compatible. Historically, Sun’s trademark license for usage of the Java brand insists that all implementations be compatible. This resulted in a legal dispute with Microsoft after Sun claimed that the Microsoft implementation did not support RMI or JNI and had added platform-specific features of their own. Sun sued in 1997, and, in 2001, won a settlement of US$20 million, as well as a court order enforcing the terms of the license from Sun.[75] As a result, Microsoft no longer ships Java with Windows.

Platform-independent Java is essential to Java EE, and an even more rigorous validation is required to certify an implementation. This environment enables portable server-side applications.

Use outside the Java platform

The Java programming language requires the presence of a software platform in order for compiled programs to be executed.

Oracle supplies the Java platform for use with Java. The Android SDK is an alternative software platform, used primarily for developing Android applications with its own GUI system.


The Android operating system makes extensive use of Java-related technology

The Java language is a key pillar in Android, an open source mobile operating system. Although Android, built on the Linux kernel, is written largely in C, the Android SDK uses the Java language as the basis for Android applications but does not use any of its standard GUI, SE, ME or other established Java standards.[76] The bytecode language supported by the Android SDK is incompatible with Java bytecode and runs on its own virtual machine, optimized for low-memory devices such as smartphones and tablet computers. Depending on the Android version, the bytecode is either interpreted by the Dalvik virtual machine or compiled into native code by the Android Runtime.

Android does not provide the full Java SE standard library, although the Android SDK does include an independent implementation of a large subset of it. It supports Java 6 and some Java 7 features, offering an implementation compatible with the standard library (Apache Harmony).


See also: Oracle America, Inc. v. Google, Inc.

The use of Java-related technology in Android led to a legal dispute between Oracle and Google. On May 7, 2012, a San Francisco jury found that if APIs could be copyrighted, then Google had infringed Oracle’s copyrights by the use of Java in Android devices.[77] District Judge William Alsup ruled on May 31, 2012, that APIs cannot be copyrighted,[78] but this was reversed by the United States Court of Appeals for the Federal Circuit in May 2014.[79] On May 26, 2016, the district court decided in favor of Google, ruling the copyright infringement of the Java API in Android constitutes fair use.[80] In March 2018, this ruling was overturned by the Appeals Court, which sent down the case of determining the damages to federal court in San Francisco.[81] Google filed a petition for writ of certiorari with the Supreme Court of the United States in January 2019 to challenge the two rulings that were made by the Appeals Court in Oracle’s favor.[82]” (WP)

See also

Comparison of Java with other languages


  1. ^ Binstock, Andrew (May 20, 2015). “Java’s 20 Years of Innovation”ForbesArchived from the original on March 14, 2016. Retrieved March 18,2016.
  2. a b c d Barbara Liskov with John Guttag (2000). Program Development in Java – Abstraction, Specification, and Object-Oriented Design. USA, Addison Wesley. ISBN 9780201657685.
  3. ^ Chaudhary, Harry H. (July 28, 2014). “Cracking The Java Programming Interview :: 2000+ Java Interview Que/Ans”. Retrieved May 29, 2016.
  4. ^ Java 5.0 added several new language features (the enhanced for loopautoboxingvarargs and annotations), after they were introduced in the similar (and competing) C# language. [1] ArchivedMarch 19, 2011, at the Wayback Machine [2]Archived January 7, 2006, at the Wayback Machine
  5. ^ Gosling, James; McGilton, Henry (May 1996). “The Java Language Environment”Archived from the original on May 6, 2014. Retrieved May 6, 2014.
  6. ^ Gosling, James; Joy, Bill; Steele, Guy; Bracha, Gilad. “The Java Language Specification, 2nd Edition”Archived from the original on August 5, 2011. Retrieved February 8, 2008.
  7. ^ “The A-Z of Programming Languages: Modula-3”. Archived from the original on January 5, 2009. Retrieved June 9,2010.
  8. ^ Niklaus Wirth stated on a number of public occasions, e.g. in a lecture at the Polytechnic Museum, Moscow in September 2005 (several independent first-hand accounts in Russian exist, e.g. one with an audio recording: Filippova, Elena (September 22, 2005). “Niklaus Wirth’s lecture at the Polytechnic Museum in Moscow”.), that the Sun Java design team licensed the Oberon compiler sources a number of years prior to the release of Java and examined it: a (relative) compactness, type safety, garbage collection, no multiple inheritance for classes – all these key overall design features are shared by Java and Oberon.
  9. ^ Patrick Naughton cites Objective-C as a strong influence on the design of the Java programming language, stating that notable direct derivatives include Java interfaces (derived from Objective-C’s protocol) and primitive wrapper classes. [3]Archived July 13, 2011, at the Wayback Machine
  10. ^ TechMetrix Research (1999). “History of Java”(PDF). Java Application Servers Report. Archived from the original (PDF) on December 29, 2010. The project went ahead under the name green and the language was based on an old model of UCSD Pascal, which makes it possible to generate interpretive code.
  11. ^ “A Conversation with James Gosling – ACM Queue”. August 31, 2004. Archived from the original on July 16, 2015. Retrieved June 9, 2010.
  12. ^ In the summer of 1996, Sun was designing the precursor to what is now the event model of the AWT and the JavaBeans component architecture. Borland contributed greatly to this process. We looked very carefully at Delphi Object Pascal and built a working prototype of bound method references in order to understand their interaction with the Java programming language and its APIs.White Paper About Microsoft’s Delegates
  13. ^ “Chapel spec (Acknowledgements)” (PDF). Cray Inc. October 1, 2015. Archived (PDF) from the original on February 5, 2016. Retrieved January 14, 2016.
  14. ^ “Gambas Documentation Introduction”. Gambas Website. Archived from the original on October 9, 2017. Retrieved October 9, 2017.
  15. ^ “Facebook Q&A: Hack brings static typing to PHP world”InfoWorld. March 26, 2014. Archivedfrom the original on February 13, 2015. Retrieved January 11, 2015.
  16. ^ “Write once, run anywhere?”Computer Weekly. May 2, 2002. Retrieved July 27, 2009.
  17. a b c “1.2 Design Goals of the Java™ Programming Language”. Oracle. January 1, 1999. Archivedfrom the original on January 23, 2013. Retrieved January 14, 2013.
  18. a b McMillan, Robert (August 1, 2013). “Is Java Losing Its Mojo?”wired.comArchived from the original on February 15, 2017. Retrieved March 8,2017. Java is on the wane, at least according to one outfit that keeps on eye on the ever-changing world of computer programming languages. For more than a decade, it has dominated the TIOBE Programming Community Index, and is back on top – a snapshot of software developer enthusiasm that looks at things like internet search results to measure how much buzz different languages have. But lately, Java has been slipping.
  19. ^ Chan, Rosalie (January 22, 2019). “The 10 most popular programming languages, according to the ‘Facebook for programmers'”Business InsiderArchived from the original on June 29, 2019. Retrieved June 29, 2019.
  20. ^ “JavaOne 2013 Review: Java Takes on the Internet of Things” from the original on April 19, 2016. Retrieved June 19, 2016.Alt URL
  21. ^ “Why should I uninstall older versions of Java from my system?”. Oracle. Retrieved September 9,2016.
  22. ^ Byous, Jon (c. 1998). “Java technology: The early years”Sun Developer NetworkSun Microsystems. Archived from the original on April 20, 2005. Retrieved April 22, 2005.
  23. ^ Object-oriented programming “The History of Java Technology”Sun Developer Network. c. 1995. Archived from the original on February 10, 2010. Retrieved April 30, 2010.
  24. ^ Murphy, Kieron (October 4, 1996). “So why did they decide to call it Java?”JavaWorld. Retrieved 2020-07-13.
  25. ^ Kabutz, Heinz; Once Upon an Oak ArchivedApril 13, 2007, at the Wayback Machine. Artima. Retrieved April 29, 2007.
  26. ^ “JAVASOFT SHIPS JAVA 1.0”. Archived from the original on March 10, 2007. Retrieved May 13,2018.
  27. ^ Object-oriented Programming with Java: Essentials and Applications. Tata McGraw-Hill Education. p. 34.
  28. ^ “JSG – Java Study Group”open-std.orgArchived from the original on August 25, 2006. Retrieved August 2, 2006.
  29. ^ “Why Java™ Was – Not – Standardized Twice”(PDF). Archived (PDF) from the original on January 13, 2014. Retrieved June 3, 2018.
  30. ^ “What is ECMA—and why Microsoft cares”Archived from the original on May 6, 2014. Retrieved May 6, 2014.
  31. ^ “Java Community Process website”. May 24, 2010. Archived from the original on August 8, 2006. Retrieved June 9, 2010.
  32. ^ “JAVAONE: Sun – The bulk of Java is open sourced”. Archived from the original on May 27, 2014. Retrieved May 26, 2014.
  33. ^ “Sun’s Evolving Role as Java Evangelist”O’Reilly MediaArchived from the original on September 15, 2010. Retrieved August 2, 2009.
  34. ^ “Oracle and Java” Oracle Corporation. Archived from the original on January 31, 2010. Retrieved August 23, 2010. Oracle has been a leading and substantive supporter of Java since its emergence in 1995 and takes on the new role as steward of Java technology with a relentless commitment to fostering a community of participation and transparency.
  35. ^ Gosling, James (April 9, 2010). “Time to move on…” On a New Road. Archived from the original on November 5, 2010. Retrieved November 16, 2011.
  36. ^ Topic, Dalibor. “Moving to a Plugin-Free Web”Archived from the original on March 16, 2016. Retrieved March 15, 2016.
  37. ^ “Learn About Java Technology”. Oracle. Archived from the original on November 24, 2011. Retrieved November 21, 2011.
  38. ^ “Oracle Java SE Support Roadmap”. Oracle. May 13, 2020. Retrieved December 11, 2020.
  39. ^ “JAVASOFT SHIPS JAVA 1.0” Archived from the original on March 10, 2007. Retrieved February 5, 2008.
  40. ^ Chander, Sharat. “Introducing Java SE 11”oracle.comArchived from the original on September 26, 2018. Retrieved September 26, 2018.
  41. ^ “The Arrival of Java 15!”Oracle. September 15, 2020. Retrieved September 15, 2020.
  42. ^ “Java Card Overview”Oracle Technology Network. Oracle. Archived from the original on January 7, 2015. Retrieved December 18, 2014.
  43. ^ “Java Platform, Micro Edition (Java ME)”Oracle Technology Network. Oracle. Archived from the original on January 4, 2015. Retrieved December 18,2014.
  44. ^ “Java SE”Oracle Technology Network. Oracle. Archived from the original on December 24, 2014. Retrieved December 18, 2014.
  45. ^ “Java Platform, Enterprise Edition (Java EE)”Oracle Technology Network. Oracle. Archived from the original on December 17, 2014. Retrieved December 18, 2014.
  46. ^ “Is the JVM (Java Virtual Machine) platform dependent or platform independent? What is the advantage of using the JVM, and having Java be a translated language?”. Programmer Interview. Archived from the original on January 19, 2015. Retrieved January 19, 2015.
  47. ^ Jelovic, Dejan. “Why Java will always be slower than C++”. Archived from the original on February 11, 2008. Retrieved February 15, 2008.
  48. ^ Google. “Loop Recognition in C++/Java/Go/Scala” (PDF). Retrieved July 12,2012.
  49. ^ “Symantec’s Just-In-Time Java Compiler To Be Integrated into Sun JDK 1.1”Archived from the original on June 28, 2010. Retrieved August 1, 2009.
  50. ^ Salcic, Zoran; Park, Heejong; Teich, Jürgen; Malik, Avinash; Nadeem, Muhammad (July 22, 2017). “Noc-HMP: A Heterogeneous Multicore Processor for Embedded Systems Designed in SystemJ”. ACM Transactions on Design Automation of Electronic Systems22 (4): 73. doi:10.1145/3073416ISSN 1084-4309S2CID 11150290.
  51. ^ “NullPointerException”. Oracle. Archived from the original on May 6, 2014. Retrieved May 6, 2014.
  52. ^ “Exceptions in Java”. Archivedfrom the original on January 21, 2009. Retrieved August 10, 2010.
  53. ^ “Java HotSpot™ Virtual Machine Performance Enhancements”. Archived from the original on May 29, 2017. Retrieved April 26, 2017.
  54. ^ “Operator Overloading (C# vs Java)”C# for Java Developers. Microsoft. Archived from the original on January 7, 2015. Retrieved December 10,2014.
  55. ^ “Multiple Inheritance of State, Implementation, and Type”The Java™ Tutorials. Oracle. Archivedfrom the original on November 9, 2014. Retrieved December 10, 2014.
  56. ^ “Lesson: A Closer Look at the Hello World Application”The Java™ Tutorials > Getting StartedOracle CorporationArchived from the original on March 17, 2011. Retrieved April 14, 2011.
  57. ^ “Deprecated APIs, Features, and Options” Retrieved May 31, 2019.
  58. ^ “Applet (Java Platform SE 7 )” Retrieved May 1, 2020.
  59. ^ “What Is a JSP Page? – The Java EE 5 Tutorial” Retrieved May 1, 2020.
  60. ^ “Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)” Retrieved May 1,2020.
  61. ^ “Removed from JDK 11, JavaFX 11 arrives as a standalone module”. Retrieved October 13, 2020.
  62. ^ “Getting Started with JavaFX: Hello World, JavaFX Style | JavaFX 2 Tutorials and Documentation” Retrieved May 1, 2020.
  63. ^ “Java and Scala’s Type Systems are Unsound”(PDF). Archived (PDF) from the original on November 28, 2016. Retrieved February 20, 2017.
  64. ^ Arnold, Ken. “Generics Considered Harmful”. Archived from the original on October 10, 2007. Retrieved September 10, 2015. More comments to the original article available at earlier archive snapshots.
  65. ^ Jelovic, Dejan. “Why Java Will Always Be Slower than C++”. Archived from the original on February 11, 2008. Retrieved October 17, 2012.
  66. ^ Owens, Sean R. “Java and unsigned int, unsigned short, unsigned byte, unsigned long, etc. (Or rather, the lack thereof)”. Archived from the original on February 20, 2009. Retrieved July 4, 2011.
  67. ^ Kahan, William. “How Java’s Floating-Point Hurts Everyone Everywhere” (PDF). Electrical Engineering & Computer Science, University of California at Berkeley. Archived (PDF) from the original on September 5, 2012. Retrieved June 4,2011.
  68. ^ “Have you checked the Java?”. Archived from the original on September 21, 2012. Retrieved December 23, 2011.
  69. ^ Cadenhead, Rogers (November 20, 2017), Understanding How Java Programs Work, retrieved March 26, 2019
  70. ^ Woolf, Nicky (May 26, 2016). “Google wins six-year legal battle with Oracle over Android code copyright”The GuardianISSN 0261-3077. Retrieved March 26, 2019.
  71. ^ “Collections Framework Overview”Java Documentation. Oracle. Archived from the original on December 31, 2014. Retrieved December 18,2014.
  72. ^ “Java™ Security Overview”Java Documentation. Oracle. Archived from the original on January 3, 2015. Retrieved December 18, 2014.
  73. ^ “Trail: Internationalization”The Java™ Tutorials. Oracle. Archived from the original on December 31, 2014. Retrieved December 18, 2014.
  74. ^ “How to Write Doc Comments for the Javadoc Tool”Oracle Technology Network. Oracle. Archived from the original on December 18, 2014. Retrieved December 18, 2014.
  75. ^ Niccolai, James (January 24, 2001). “Sun, Microsoft settle Java lawsuit”JavaWorldIDG News Service. Retrieved 2020-07-13.
  76. ^ van Gurp, Jilles (November 13, 2007). “Google Android: Initial Impressions and Criticism”Javalobby. Retrieved March 7, 2009. Frankly, I don’t understand why Google intends to ignore the vast amount of existing implementation out there. It seems like a bad case of “not invented here” to me. Ultimately, this will slow adoption. There are already too many Java platforms for the mobile world and this is yet another one
  77. ^ Mullin, Joe. “Google guilty of infringement in Oracle trial; future legal headaches loom”Law & Disorder. Ars Technica. Archived from the original on May 8, 2012. Retrieved May 8, 2012.
  78. ^ Mullin, Joe (May 31, 2012). “Google wins crucial API ruling, Oracle’s case decimated”Ars TechnicaArchived from the original on March 12, 2017. Retrieved June 1, 2012.
  79. ^ Rosenblatt, Seth (May 9, 2014). “Court sides with Oracle over Android in Java patent appeal”CNETArchived from the original on May 10, 2014. Retrieved May 10, 2014.
  80. ^ Mullin, Joe (May 26, 2016). “Google beats Oracle—Android makes “fair use” of Java APIs”Ars TechnicaArchived from the original on January 20, 2017. Retrieved May 26, 2016.
  81. ^ Farivar, Cyrus (March 27, 2018). “”Google’s use of the Java API packages was not fair,” appeals court rules”Ars Technica. Retrieved August 6, 2019.
  82. ^ Lee, Timothy (April 23, 2019). “Google asks Supreme Court to overrule disastrous ruling on API copyrights”Ars Technica. Retrieved April 23,2019.

Works cited

External links

Wikiversity has learning resources about Java Platform, Enterprise Edition/Java EE Tutorial
  •  The dictionary definition of Java at Wiktionary
  •  Media related to Java at Wikimedia Commons
  •  Java at Wikibooks
  •  Learning materials related to Java at Wikiversity

Fair Use Sources:


Trackball – 1946 A.D.

Return to Timeline of the History of Computers



Ralph Benjamin (b. 1922), Kenyon Taylor (1908–1986), Tom Cranston (c. 1920–2008), Fred Longstaff (dates unavailable)

“The trackball was one of the first computer input devices to enable freeform cursor movement by the user, simultaneously over both the x- and y-axes on a computer screen. But there was a long time between its invention and its widespread use.

A British engineer named Ralph Benjamin designed the first prototype trackball while working on a radar project for the Royal Navy Scientific Service in 1946. The radar project was called the Comprehensive Display System and enabled ships to monitor low-flying aircraft on X and Y coordinates using a joystick as the input device. Benjamin tried to improve upon this method of input with an invention he called the roller ball, which consisted of a metal casing containing a metal ball with two rubber wheels. It allowed users to control their onscreen movements with greater precision to input location data about a target’s aircraft. The British kept the device a military secret until 1947, when it was patented in Benjamin’s name and described as a device that correlated data between electronic storage and displays.

In 1952, Canadian engineers Tom Cranston, Fred Longstaff, and Kenyon Taylor built upon Benjamin’s concept and designed a trackball for the Royal Canadian Navy’s Digital Automated Tracking and Resolving (DATAR) system, a computerized battlefield information system. The design, based upon the Canadian five-point bowling ball, allowed an operator to control and track the location of user input on the screen.

Benjamin’s roller ball eventually had a large influence on the development of the mouse and the modern trackball. The roller ball differed from the mouse in that it was a stationary object that was controlled by the user’s hand and fingers moving over it, rather than repositioning the entire device to different locations in physical space.”

SEE ALSO The Mouse (1967)

“The first trackball used a Canadian five-pin bowling ball floated on a cushion of air as its input device; the nozzle for the air supply is visible at the lower right.”

Fair Use Source: B07C2NQSPV

History Software Engineering

Floating-Point Numbers

Return to Timeline of the History of Computers


Floating-Point Numbers

Leonardo Torres y Quevedo (1852–1936), William Kahan (b. 1933)

“Leonardo Torres y Quevedo was a Spanish engineer and mathematician who delighted in making practical machines. In 1906, he demonstrated a radio-controlled model boat for the king of Spain, and he designed a semirigid airship used in World War I.

Torres was also a fan of Babbage’s difference and analytical engines. In 1913, he published Essays in Automatics, which described Babbage’s work and presented the design for a machine that could calculate the value of the formula a(y–z)2 for specified values of a, y, and z. To allow his machine to handle a wider range of numbers, Torres invented floating-point arithmetic.

Floating-point arithmetic extends the range of a numerical calculation by decreasing its accuracy. Instead of storing all of the digits in a number, the computer stores just a few significant digits, called the significand, and a much shorter exponent. The actual “number” is then computed using the formula: significand × baseexponent

For example, the gross domestic product of the United States in 2016 was 18.57 trillion dollars. Storing that number with a fixed-point representation requires 14 digits. But storing it in floating point requires just 6 digits: $18.57 trillion = 1.857 × 1013

Thus, with floating-point numbers, sometimes called scientific notation on modern calculators, a 10-digit register (a mechanical or electronic gadget that can store a number) that would normally be limited to storing numbers between 1 and 9,999,999,999 instead can be partitioned into an 8-digit significand and a 2-digit exponent, allowing it to store numbers as small as 0.0000001 × 10–99 and as large as 9.9999999 × 1099.

Modern floating-point systems use binary rather than decimal digits. Under the standard developed by Canadian mathematician William Kahan for the Intel 8086 microprocessor and adopted in 1985 by the Institute of Electrical and Electronics Engineers (IEEE 754), single precision floating point uses 24 bits for the significand and 8 bits for the exponent.”

For his work, Kahan won the Association for Computing Machinery’s (ACM) A.M. Turing Award in 1989.”

SEE ALSO Binary Arithmetic (1703), Z3 Computer (1941), Binary-Coded Decimal (1944)

Portrait of Leonardo Torres y Quevedo by Argentinian cartoonist and illustrator Eulogia Merle (b. 1976).”

Fair Use Source: B07C2NQSPV