Here you can find the source of addAll(Object[] array, List list)
private static void addAll(Object[] array, List list)
//package com.java2s; /******************************************************************************* * Copyright (c) 2005, 2007 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * // w w w . ja v a2 s. c om *******************************************************************************/ import java.util.*; public class Main { private static void addAll(Object[] array, List list) { for (int i = 0; i < array.length; i++) { if (!list.contains(array[i])) list.add(array[i]); } } }