/* * Copyright 2002-2006 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package cyrille.util.concurrent.demo; import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; import java.util.List; /** * @author <a href="mailto:cyrille.leclerc@pobox.com">Cyrille Le Clerc</a> */ @SuppressWarnings({"unchecked", "unused"}) public class UnSafeListIteration { List values = Collections.synchronizedList(new ArrayList()); /** * NOT THREAD SAFE iteration on values ! Problem would be the same with java 5 enhanced "for loop". */ public void doJob() { Iterator valuesIterator = this.values.iterator(); while (valuesIterator.hasNext()) { Object value = valuesIterator.next(); // do job ... } } public void add(Object value) { this.values.add(value); } }