时间:2020-10-06 21:53:31 | 栏目:JAVA代码 | 点击:次
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: