Any difference between Java and Javaw, thanks

I can launch my program with java successfully. But on the same setting, javaw failed. WHY?
Thanks

the only difference between java.exe and javaw.exe is that javaw.exe does no (system) output.
see http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/java.html
"The javaw command is identical to java, except that with javaw there is no associated console window. Use javaw when you don't want a command prompt window to appear. The javaw launcher will, however, display a dialog box with error information if a launch fails for some reason. "

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