ClassLoader and inner classes

I have this method (in my own classloader) that loads classes from zip:

Code Java:

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ZipInputStream in = new ZipInputStream(new FileInputStream(zip));
ZipEntry entry;
while ((entry = in.getNextEntry()) != null) {
	if (!entry.isDirectory()) {
		byte[] buffer = new byte[(int) entry.getSize()];
		in.read(buffer);
		if (!entry.getName().endsWith(".class"))
			continue;
		String name = entry.getName().replace(".class", "").replace("/", ".");
		Class<?> cls = this.defineClass(name, buffer, 0, buffer.length);
		this.resolveClass(cls);
	}
}

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The zip that im trying to load looks like this:

Quote:

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TestClass.class
TestClass$SomeOtherInnerClass.class

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My problem is that defineClass() fails to load the TestClass$SomeOtherInnerClass. If this class is loaded before the actual TestClass i get this:

Quote:

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java.lang.NoClassDefFoundError: TestClass

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I also tried to load the TestClass.class first but then im getting this error:

Quote:

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java.lang.ClassFormatError: Wrong InnerClasses attribute length in class file TestClass

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Please help me:-??

The problem is that the class loader cannot load the inner class. For example, URLClassLoader assumes all requests are for outer classes.

Try this:
Thread.currentThread().getContextClassLoader().loa dClass( classFQN );

This works, even for inner classes. Many people recommend creating your own class loader or extending URLClassLoader but that is not actually necessary, most of the time.