Problem in building the development component

Actually I was trying to Build one of the development component I developed I found the error given below

May 17, 2007 6:39:40 PM /userOut/Development Component (com.sap.ide.eclipse.component.provider.listener.DevConfListener) [Thread[ModalContext,5,main]] ERROR: model: Build failed for sap.com/model(MyComponents) in variant "default": Unable to find a javac compiler;

com.sun.tools.javac.Main is not on the classpath.

Perhaps JAVA_HOME does not point to the JDK

Then I found JDK was not installed on my machine then I installed the JDK but it is giving same error yet, can any body help me to set the path or class pth so that I can be able to build my DC.

Thanks

Sandeep