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If you just read the "What is Java?" page (like you were supposed to), then you would understand the importance of installing the Java Virtual Machine (JVM) on your computer. In fact, in order to use this online tutorial, you must have the JVM installed on your computer. All of our lessons are actually Java Applets themselves, so you need the JVM to view them.
The JVM allows you to view (interpret) Java programs. You also need a Java compiler to be able to create you own Java programs. Lucky for you, everything you need is neatly packaged together in the Java Development Kit (JDK). It contains a compiler, interpreter, debugger, and more. The JDK is freely available from Sun Microsystems. You can download the latest version in the download section of their website http://java.sun.com. Currently, the latest version is 1.4.1 and can be downloaded from http://java.sun.com/j2se/1.4.1/download.html.
- Make sure you download the JDK (or SDK) not the JRE
- Download the version that matches the platform you are using (ex. Windows, Unix, etc)
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