Java tutorial
//package com.java2s; /* * This file is part of WebLookAndFeel library. * * WebLookAndFeel library is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * WebLookAndFeel library 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with WebLookAndFeel library. If not, see <http://www.gnu.org/licenses/>. */ import java.util.*; public class Main { /** * Adds all non-null objects into the specified list. * * @param collection list to fill * @param objects objects * @param <T> objects type * @return true if list changed as the result of this operation, false otherwise */ public static <T> boolean addAllNonNull(final Collection<T> collection, final T... objects) { boolean result = false; for (final T object : objects) { if (!collection.contains(object) && object != null) { result |= collection.add(object); } } return result; } /** * Adds all non-null objects into the specified list. * * @param collection list to fill * @param objects objects * @param <T> objects type * @return true if list changed as the result of this operation, false otherwise */ public static <T> boolean addAllNonNull(final Collection<T> collection, final Collection<T> objects) { boolean result = false; for (final T object : objects) { if (!collection.contains(object) && object != null) { result |= collection.add(object); } } return result; } }