Here you can find the source of hasSuperclass(Class> klass, Class> ancestor)
public static boolean hasSuperclass(Class<?> klass, Class<?> ancestor)
//package com.java2s; /*/* w w w .j a v a 2s. co m*/ * Copyright 2012 Andy Boothe * * 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.ArrayList; import java.util.List; public class Main { public static boolean hasSuperclass(Class<?> klass, Class<?> ancestor) { return getAncestry(klass).contains(ancestor); } public static <T> List<Class<? super T>> getAncestry(Class<T> klass) { if (klass == null) throw new NullPointerException(); List<Class<? super T>> result = new ArrayList<Class<? super T>>(); Class<? super T> iter = klass; do { result.add(iter); iter = iter.getSuperclass(); } while (iter != null); return result; } }