夜深了，快睡吧-sleep()和wait()区别

sleep():

• 属于Thread类
• sleep()方法导致了程序暂停执行指定的时间，让出cpu去其他线程，但是他的监控状态依然保持者，当指定的时间到了又会自动恢复运行状态
• 在调用sleep()方法的过程中，线程不会释放对象锁

wait():

• 属于object的方法
• 调用wait()方法的时候，线程会放弃对象锁，进入等待此对象的等待锁定池，只有针对此对象调用notify()方法后本线程才进入对象锁定池准备

废话不多说，直接撸代码

public class mySleepTest {
    public static void main(String[] args) {
        new Thread(new Thread1()).start();
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        new Thread(new Thread2()).start();
    }

    public static class Thread1 implements Runnable {

        public void run() {
            synchronized (mySleepTest.class) {
                System.out.println("enter thread 1 .....");
                System.out.println("thread1 is wairting....");
                try {
                    mySleepTest.class.wait();
                } catch (Exception e) {

                }
                System.out.println("thread1 is going on ...");
                System.out.println("thread1 is over");
            }
        }
    }

    public static class Thread2 implements Runnable {

        public void run() {
            synchronized (mySleepTest.class) {
                System.out.println("enter thread 2 ...");
                System.out.println("thread 2 is sleeping ...");
                mySleepTest.class.notify();

                try {
                    Thread.sleep(5000);
                } catch (Exception e) {

                }
                System.out.println("thread 2 is going on ...");
                System.out.println("thread 2 is over ...");
            }
        }
    }
}

运行结果

enter thread 1 .....
thread1 is wairting....
enter thread 2 ...
thread 2 is sleeping ...
thread 2 is going on ...
thread 2 is over ...
thread1 is going on ...
thread1 is over
Process finished with exit code 0

注释掉 mySleepTest.class.notify();
运行结果：

enter thread 1 .....
thread1 is wairting....
enter thread 2 ...
thread 2 is sleeping ...
thread 2 is going on ...
thread 2 is over ...
（程序一直停在此处....）

相信聪明的你已经懂了吧.....