There are three simple ways to set JAVA_HOME in Windows. This tutorial shows you how to do it manually, from the command line and through the installer.

Now, open the Command Prompt and run it as administrator. We will make use of the ‘cd’ command to change the operating directory on the Command Prompt to the one where your Java program is stored.

You'd either include the paths in your invocations of javac and java with the -cp command line switch, or if you're using a build tool or IDE, it'll have its own method of managing the classpath.

The ability to identify the source of a class definition in a Java application is an especially useful tactic when one knows or has reason to suspect that a particular class is defined twice on ...