Introduction to Java

What is Java?

Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!

Applications of Java

According to Sun, 3 billion devices run Java. There are many devices where Java is currently used. Some of them are as follows:

  • Desktop Applications such as acrobat reader, media player, antivirus, etc.
  • Web Applications such as,, etc.
  • Enterprise Applications such as banking applications.
  • Mobile
  • Embedded System
  • Smart Card
  • Robotics
  • Games, etc.

History of Java

The history of Java is very interesting. Java was originally designed for interactive television, but it was too advanced technology for the digital cable television industry at the time. The history of Java starts with the Green Team. Java team members (also known as Green Team), initiated this project to develop a language for digital devices such as set-top boxes, televisions, etc. However, it was suited for internet programming. Later, Java technology was incorporated by Netscape.

The principles for creating Java programming were "Simple, Robust, Portable, Platform-independent, Secured, High Performance, Multithreaded, Architecture Neutral, Object-Oriented, Interpreted, and Dynamic". Java was developed by James Gosling, who is known as the father of Java, in 1995. James Gosling and his team members started the project in the early '90s.

Currently, Java is used in internet programming, mobile devices, games, e-business solutions, etc.

Many java versions have been released till now. The current stable release of Java is Java SE 14.

  • JDK Alpha and Beta (1995)
  • JDK 1.0 (Jan 1996)
  • JDK 1.1 (Feb 1997)
  • J2SE 1.2 (Dec 1998)
  • J2SE 1.3 (May 2000)
  • J2SE 1.4 (Feb 2002)
  • J2SE 5.0 (Sep 2004)
  • Java SE 6 (Dec 2006)
  • Java SE 7 (July 2011)
  • Java SE 8 (Mar 2014)
  • Java SE 9 (Sep 2017)
  • Java SE 10 (Mar 2018)
  • Java SE 11 (Sep 2018)
  • Java SE 12 (Mar 2019)
  • Java SE 13 (Sep 2019)
  • Java SE 14 (Mar 2020)
  • Java SE 15 (Sep 2020)*
  • Java SE 16 (Mar 2021)*
  • Java SE 17 (Sep 2021)*
* These versions are in development and ready to release.

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