Gnu Compiler for Java compiling

[Me Myself and I <stargate7thsymbol@live.co.uk>]

I have just gone through the install with internet download using
the latest cygwin windows installer,
on my 64 bit Microsoft Windows 7.  I assume that I've only gotten
32 bit software, which is not my issue.

I am trying to compile my first java program,

gcj Program.java --main=Program -o Program.exe

and I find that I only get the errror message:

Exception in thread "main" java.lang.NoClassDefFoundError: org.eclipse.jdt.internal.compiler.batch.GCCMain
   at gnu.java.lang.MainThread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.internal.compiler.batch.GCCMain not found in gnu.gcj.runtime.SystemClassLoader{urls=[], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(Unknown Source)
   at java.lang.ClassLoader.loadClass(Unknown Source)
   at java.lang.ClassLoader.loadClass(Unknown Source)
   at gnu.java.lang.MainThread.run(Unknown Source)

Has there been a corrupted installation or download?  Should I just

reinstall cygwin from the start?  Or is there something simple I should do?
 		 	   		  

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