Java Overview

What is Java?

Java is a popular programming language, created in 1995.  Java is a high level, robust, object-oriented and secure programming language.  Any hardware or software environment in which a program runs is known as a platform. Since Java has a runtime environment (JRE) and API, it is called a platform.

It is owned by Oracle, and more than 3 billion devices run Java.

It is used for:

  • Mobile applications (especially Android apps)
  • Desktop applications
  • Web applications
  • Web servers and application servers
  • Games
  • Database connection
  • And much, much more!

Why Use Java?

  • Java works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc.) as Java is Platform independent.
  • It is one of the most popular programming languages in the world
  • It is easy to learn and simple to use
  • It is open-source and free
  • It is secure, fast and powerful
  • It has huge community support (tens of millions of developers)

Application

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.

History of Java

James Gosling initiated the Java language project in June 1991 for use in one of his many set-top box projects. The language, initially called ‘Oak’ after an oak tree that stood outside Gosling's office, also went by the name ‘Green’ and ended up later being renamed as Java, from a list of random words.

Sun released the first public implementation as Java 1.0 in 1995. It promised to Write Once, Run Anywhere (WORA), providing no-cost run-times on popular platforms.

On 13 November 2006, Sun released much of Java as free and open source software under the terms of the GNU General Public License (GPL).

On 8 May 2007, Sun finished the process, making all of Java's core code free and open-source, aside from a small portion of code to which Sun did not hold the copyright.

Tools You Will Need

For performing the examples discussed in this tutorial, you will need a Pentium 200-MHz computer with a minimum of 64 MB of RAM (128 MB of RAM recommended).

You will also need the following software −

  • Linux 7.1 or Windows xp/7/8 operating system
  • Java JDK 8
  • Microsoft Notepad or any other text editor

This tutorial will provide the necessary skills to create GUI, networking, and web applications using Java.