Installing Java

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There are various editions of Java :

  • Java SE stands for Java standard edition and is normally for developing desktop applications, forms the core/base API.
  • Java EE stands for Java enterprise edition for applications which run on servers, for example web sites.
  • Java ME stands for Java micro edition for applications which run on resource constrained devices (small scale devices) like cell phones, for example games.

Further every Java edition consists of two elements: JRE and JDK

  • JRE: Java Runtime Environment. It is basically the Java Virtual Machine where your Java programs run on. It also includes browser plugins for Applet execution.
  • JDK: It's the full featured Software Development Kit for Java, including JRE, and the compilers and tools (like JavaDoc, and Java Debugger) to create and compile programs.
Usually, when you only care about running Java programs on your browser or computer you will only install JRE. It's all you need. On the other hand, if you are planning to do some Java programming, you will also need JDK.
If you are a beginner or you simply want to learn Java you can go ahead and download the JDK ( Java Development Kit) for the Java SE edition. Simply download and install the exe file by following the instructions.

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