James Tam Java History Background information about Java and how it affected it’s development.

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Presentation transcript:

James Tam Java History Background information about Java and how it affected it’s development

James Tam Java: History Computers of the past

James Tam Java: History (2) The invention of the microprocessor revolutionized computers Intel microprocessor Commodore Pet microcomputer

James Tam Java: History (3) It was believed that the logical next step for microprocessors was to have them run intelligent consumer electronics

James Tam Java History (4) Sun Microsystems funded an internal research project “Green” to investigate this opportunity. -Result: A programming language called “Oak” Blatant advertisement: James Gosling was a graduate of the U of C Computer Science program. Wav file from “The Simpsons” © Fox, Image from the website of Sun Microsystems

James Tam Java History (5) -Problem: There was already a programming language called Oak. -The “Green” team met at a local coffee shop to come up with another name... Java!

James Tam Java: History (6) The concept of intelligent devices didn’t catch on. Project Green and work on the Java language was nearly canceled.

James Tam Java: History (7) The popularity of the Internet resulted in Sun’s re-focusing of Java on computers. Prior to the advent of Java, web pages allowed you to download only text and images. Your computer at home running a web browser User clicks on a link Images and text get downloaded Server containing a web page

James Tam Your computer at home running a web browser Server containing a web page Java: History (8) Java enabled web browsers allowed for the downloading of programs (Applets). Java is still used in this context today: -Facebook (older version) -Hotmail (older version) User clicks on a link Java Applet downloaded Java version of the Game of Life: Online checkers:

James Tam Java: Write Once, Run Anywhere Consequence of Java’s history: platform-independence Mac user running Safari Windows user running Internet Explorer Web page stored on Unix server Click on link to Applet Byte code is downloaded Virtual machine translates byte code to native Mac code and the Applet is run Byte code (part of web page)

James Tam Java: Write Once, Run Anywhere Consequence of Java’s history: platform-independent Mac user running Safari Windows user running Internet Explorer Web page stored on Unix server Click on link to AppletByte code is downloaded Virtual machine translates byte code to native Windows code and the Applet is run

James Tam After This Section You Should Now Know How Java was developed and the impact of it's roots on the language Major players and events in the development of Java