classworlds is a framework for container developers who require complex manipulation of Java's ClassLoaders. Java's native ClassLoader mechanims and classes can cause much headache and confusion for certain types of application developers. Projects which involve dynamic loading of components or otherwise represent a 'container' can benefit from the classloading control provided by classworlds. Added as a maven dependency to java-overlay
dev-java/classworlds is already in the tree *** This bug has been marked as a duplicate of bug 45991 ***