error while run the java service

Hi all,
when i am run the simple java service ,it shows the error like this " To run this service, first recompile the Java source",waiting for your response,thank q

Take a lock on the java service. Make some change say hit the Enter key, and save. This will result in recompiling the service.

i done the same thing but i didn’t get the result i shows like this:
error in opening zip file,what should i do.

Is this a java service which you have run earlier or is it something which has been copied from some place. I suspect that you might be missing required jar files for compiling the source.