Here you can find the source of isArrayOrCollection(Class clazz)
public static boolean isArrayOrCollection(Class clazz)
//package com.java2s; /*//from www . ja v a 2s.co m * Copyright (C) 2010 Sergey Panasenko * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. */ import java.util.Collection; public class Main { public static boolean isArrayOrCollection(Class clazz) { if (clazz.isArray()) return true; return Collection.class.isAssignableFrom(clazz); } }