Java tutorial
//package com.java2s; import java.util.*; public class Main { private static void _addSuperTypes(Class<?> cls, Class<?> endBefore, Collection<Class<?>> result, boolean addClassItself) { if (cls == endBefore || cls == null || cls == Object.class) { return; } if (addClassItself) { if (result.contains(cls)) { // already added, no need to check supers return; } result.add(cls); } for (Class<?> intCls : cls.getInterfaces()) { _addSuperTypes(intCls, endBefore, result, true); } _addSuperTypes(cls.getSuperclass(), endBefore, result, true); } }