Dumb question about classpath

ok I am running windows 2000 and I cannot run executables like 'javac' outside of the bin dir.
I tried all the set classpath = c:\1234\bin; c:\temp; etc., etc. I tried going through the control panel, system and environment variables and I cannot get java to work right. I want to be able to work out of any dir in the command prompt window.
Can anyone help me out?
thanks in advance

right click on my computer click advanced click environment variables
and add c:\jdk1.x.x.\bin to the path var
OR
everytime you open a dos shell type path= c:\jdk1.x.x.\bin

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