synchronized嵌套synchronized 案例-526互联


public class MultiLockExample {
    private Object lock1 = new Object();
    private Object lock2 = new Object();

    public void method1() throws InterruptedException {
        synchronized (lock1) {
            System.out.println("进入方法1");

            // 线程在获取lock1锁后，进入阻塞状态并等待100毫秒
//            Thread.sleep(100);
            // 线程尝试获取lock2锁
            synchronized (lock2) {
                System.out.println("执行方法1");
                lock2.notify();
            }
        }
    }

    public void method2() throws InterruptedException {
        synchronized (lock2) {
            System.out.println("进入方法2");
            lock2.wait();
            // 线程尝试获取lock1锁
            synchronized (lock1) {
                System.out.println("执行方法2");

            }
        }
    }

    public static void main(String[] args) {
        MultiLockExample example = new MultiLockExample();

        Thread thread1 = new Thread(() -> {
            try {
                example.method1();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        });
        Thread thread2 = new Thread(() -> {
            try {
                example.method2();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        });

        thread1.start();
        thread2.start();
    }
}