java线程中的notifyAll唤醒操作
注意:
java中的notifyAll和notify都是唤醒线程的操作,notify只会唤醒等待池中的某一个线程,但是不确定是哪一个线程,notifyAll是针对指定对象里面的所有线程执行唤醒操作,指定对象一旦唤醒成功。则会立即加入线程的资源争夺中去。
例如:
package TestThread.ThreadSynchronized; public class TestWaitAll { public static void main(String[] args) { Test1 test1 = new Test1(); Thread t = new Thread(test1, "线程1"); Thread t1 = new Thread(test1, "线程2"); Thread t2 = new Thread(test1, "线程3"); Test2 test2 = new Test2(test1, "唤醒线程"); t.start(); t1.start(); t2.start(); try { Thread.sleep(2000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } test2.start(); } } class Test1 implements Runnable { public void run() { synchronized (this) { try { this.wait(); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread().getName() + "当前没有被执行到!"); } } } class Test2 extends Thread { private Test1 test1; String name; public Test2(Test1 test1, String name) { super(name); this.name = name; this.test1 = test1; } public void run() { synchronized (test1) { test1.notifyAll();// 针对当前对象执行唤醒所有线程的操作 System.out.println(Thread.currentThread().getName() + ":唤醒线程执行成功!"); } } }
执行结果为:
【博客地址】:http://www.cnblogs.com/chaiyesong
【QQ】:2318408707
【邮件地址】:chaiyesong@yeah.net
【工作年限】:4年
【擅长领域】:软件测试、Java、C#、JavaScript、Jmeter、Sql Server