Java、Android多线程、线程安全、线程同步

/* * Copyright © Yolanda. All Rights Reserved * * 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 com.yolanda.multithread; import java.io.Serializable; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; /** * Created in Mar 27, 2016 11:33:04 AM. * * @author Yolanda; */ public class Tasker implements Serializable, Comparable<Tasker> { private static final long serialVersionUID = 1565L; private static Integer value = 0; /** Lock模块事例 **/ private Lock lock; public void change2() { lock.lock(); try { value++; System.out.println(value); if (value == 50) throw new RuntimeException(""); } finally { lock.unlock(); } } /** synchronized模块事例 **/ private static Object object = new Object(); /** * 执行任务；synchronized锁定方法体。 */ public void change() { synchronized (object) { value++; System.out.println(value); } if (value == 50) throw new RuntimeException(""); } /** * 执行任务；synchronized锁定方法。 */ // public synchronized void change() { // value++; // System.out.println(value); // } @Override public int compareTo(Tasker o) { return 0; } private Tasker() { lock = new ReentrantLock(); } private static Tasker tasker; public synchronized static Tasker getInstance() { if (tasker == null) tasker = new Tasker(); return tasker; } }