How to setup JAVA_HOME environment variable in Windows

Please follow the instructions to set up JAVA_HOME environment variable in your computer. First find out the installation folder of Java development kit (JDK) in your machine. Let's assume it is installed in the folder "C:/j2sdk1.4.2"

1. Right click on the My Computer icon on your desktop and select properties
2. Click the Advanced Tab
3. Click the Environment Variables button
4. Under System Variable, click New
5. Enter the variable name as JAVA_HOME
6. Enter the variable value as the install path for the Development Kit
7. Click OK
8. Click Apply Changes

Ref : http://wso2.org/project/wsas/java/1.1/docs/setting-java-home.html