Java is one of the world's most important and widely used computer languages, and it has held this distinction for many years. Unlike some other computer languages whose influence has weared with passage of time, while Java's has grown.
As of 2015, Java is one of the most popular programming languages in use, particularly for client-server web applications, with a reported 9 million developers using and working on it.
Java was developed by James Ghosling, Patrick Naughton, Mike Sheridan at Sun Microsystems Inc. in 1991. It took 18 months to develop the first working version.
The initial name was Oak but it was renamed to Java in 1995 as OAK was a registered trademark of another Tech company.
Java was initially launched as Java 1.0 but soon after its initial release, Java 1.1 was launched. Java 1.1 redefined event handling, new library elements were added.
In Java 1.2 Swing and Collection framework was added and
stop() methods were deprecated from Thread class.
No major changes were made into Java 1.3 but the next release that was Java 1.4 contained several important changes. Keyword
assert, chained exceptions and channel based I/O System was introduced.
Java 1.5 was called J2SE 5, it added following major new features :
Next major release was Java SE 7 which included many new changes, like :
And the latest addition to the lot is, Java SE 8, it was released on March 18, 2014. Some of the major new features introduced in JAVA 8 are,
java.util.streamto provide Stream API.
Java is widely used in every corner of world and of human life. Java is not only used in softwares but is also widely used in designing hardware controlling software components. There are more than 930 million JRE downloads each year and 3 billion mobile phones run java.
Following are some other usage of Java :
For running Java programs in your system you will have to download and install JDK kit from here (current version is jdk 1.8).