How can I list all classes loaded in a specific class loader

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Try this. It’s a hackerish solution but it will do.

The field classes in any classloader (under Sun’s impl since 1.0) holds hard reference to the classes defined by the loader so they won’t be GC’d. You can take a benefit from via reflection.

Field f = ClassLoader.class.getDeclaredField("classes");
f.setAccessible(true);

ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
Vector<Class> classes =  (Vector<Class>) f.get(classLoader);

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