wait和notify使用例子

public class Test2 {
    public static void main(String[] args) {
        String lock = "lock";
        Thread thread1 = new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (lock){
                    System.out.println("线程1开始等待" + System.currentTimeMillis());
                    try {
                        lock.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println("线程1结束等待" + System.currentTimeMillis());
                }
            }
        }){
        };
        Thread thread2 = new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (lock){
                    System.out.println("线程2开始等待唤醒" + System.currentTimeMillis());
                    lock.notify();
                    System.out.println("线程2开始唤醒" + System.currentTimeMillis());
                }
            }
        }){
        };
        thread1.start();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        thread2.start();
    }
}