Java tutorial
//package com.java2s; /* * Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.Set; public class Main { private static void collectAssignables(Class c1, Class c2, Set s) { if (c1.isAssignableFrom(c2)) { s.add(c1); } Class sc = c1.getSuperclass(); if (sc != null) { collectAssignables(sc, c2, s); } Class[] itf = c1.getInterfaces(); for (int i = 0; i < itf.length; ++i) { collectAssignables(itf[i], c2, s); } } }