Failed to compile J2EE source files

Hi all, I'm learning J2EE these days. When I followed the tutorials on how to compile source files,
eg. 1. In a terminal window, go to the j2eetutorial/examples directory.
2. Type the following command:
ant converter
I got a message with title "16 bit MS-DOS Subsystem" and content
"C:\WINDOWS\system32\ntvdm.exe
Error while setting up environment for the application. Choose 'Close' to terminate the application."
Could anyone tell me what's going on?
Thanks very much

The documentation on the javac command has information on the options it provides:
[http://java.sun.com/javase/6/docs/technotes/tools/windows/javac.html]
Otherwise you could use a tool like Ant to manage the build.

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