That all depends on your operating system :)
They are system properties. In Win9X they go into autoexec.bat, in WinNt/2K
in the system profile, etc.
basic command is SET JAVA_HOME=c:\jdk1.3.0 for example

> hey i am a novice to java and am trying to install
> tomcat can anyone tell me in which file do we have to
> set the java home and tomcat home properties.
>
>
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