Here you can find the source of addAllIgnoreNull(Collection c, T... elements)
public static <T> boolean addAllIgnoreNull(Collection<? super T> c, T... elements)
//package com.java2s; /*/* w w w. j ava2 s. c o m*/ * Copyright (C) 2000 - 2013 Silverpeas * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * As a special exception to the terms and conditions of version 3.0 of * the GPL, you may redistribute this Program in connection with Free/Libre * Open Source Software ("FLOSS") applications as described in Silverpeas's * FLOSS exception. You should have recieved a copy of the text describing * the FLOSS exception, and it is also available here: * "http://www.silverpeas.org/docs/core/legal/floss_exception.html" * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.util.Collection; public class Main { /** * Null elements are not taking into account. * @see Collections#addAll(java.util.Collection, Object[]) */ public static <T> boolean addAllIgnoreNull(Collection<? super T> c, T... elements) { boolean result = false; for (T element : elements) { if (element != null) { result |= c.add(element); } } return result; } }