which class file has the bad version #?

[Bill Janssen]

I'm compiling a jar file with JCC 2.4.1, and get the following:

% python -m jcc.__main__ --build --jar GoodStuff.jar
Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version 
number in .class file
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:676)
        at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:317)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:375)
Traceback (most recent call last):
  File 
"/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/runpy.py",
 line 95, in run_module
    filename, loader, alter_sys)
  File 
"/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/runpy.py",
 line 52, in _run_module_code
    mod_name, mod_fname, mod_loader)
  File 
"/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/runpy.py",
 line 32, in _run_code
    exec code in run_globals
  File 
"/Library/Python/2.5/site-packages/JCC-2.4.1-py2.5-macosx-10.5-i386.egg/jcc/__main__.py",
 line 88, in <module>
    cpp.jcc(sys.argv)
  File 
"/Library/Python/2.5/site-packages/JCC-2.4.1-py2.5-macosx-10.5-i386.egg/jcc/cpp.py",
 line 409, in jcc
    cls = findClass(className.replace('.', '/'))
jcc.cpp.JavaError: java.lang.UnsupportedClassVersionError: Bad version number 
in .class file
Java stacktrace:
java.lang.UnsupportedClassVersionError: Bad version number in .class file
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:676)
        at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:317)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:375)

%

At times like these it would be very handy to know just which class file
is causing the problem.

Also, I just compiled this GoodStuff.jar file from source with the same
java.  How can there be version number mismatches?

Bill