Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2007 DSource.org 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 * * Contributors: * Bruno Medeiros - initial implementation *******************************************************************************/ import java.util.Collection; import java.util.Iterator; public class Main { public static <ELEM, COLL extends Collection<? super ELEM>> COLL addAll2(COLL dest, Iterable<? extends ELEM> source) { return addAllFromIterator(dest, source.iterator()); } public static <ELEM, COLL extends Collection<? super ELEM>> COLL addAllFromIterator(COLL dest, Iterator<? extends ELEM> source) { while (source.hasNext()) { dest.add(source.next()); } return dest; } }