Java线程中的notifyAll唤醒操作(推荐)

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！");  } }}