What message(s) are you getting from command prompt? What is the path you installed JDK into and what did you put to be part of your environment variable? Please TellTheDetails, so we will be able to help you.
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Joined: Dec 22, 2012
Run cmd from C:\Users\Username:
mesage: javac is not recognized as an internal or external command...
Path= C:\Program Files\Java\jdk1.7.0_10\bin
Enviroment variable starts with C:\Program Files\Java\jdk1.7.0_10\bin; C:\windows\system32; etc;