What is Java ?

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Java technology is both a programming language and a platform.

Java - As a Programming Language
  • The Java programming language is a high-level, object-oriented and general-purpose computer programming language.
  • Java is similar to C++, but simplified to eliminate language features that cause common programming errors.
  • You can use Java to write computer applications that play games, store data or do any of the thousands of other things computer software can do.
  • It is intended to let application developers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation.
Java - As a Computing Platform
  • A platform is the hardware or software environment in which a program runs. Some of the most popular platforms are Microsoft Windows, Linux, Solaris OS, and Mac OS.
  • Since Java has its own runtime environment (JRE) and API, it is called a platform.
  • There are lots of applications and websites that will not work unless you have Java installed, and more are created every day.
  • From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!       
Where is Java used?

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 irctc.co.in, javatpoint.com etc.
  • Enterprise Applications such as banking applications.
  • Mobile
  • Embedded System
  • Smart Card
  • Robotics
  • Games etc.




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