演示調用sleep方法，鎖是否釋放

/**
 * 演示調用sleep方法，鎖是否釋放
 */
public class SleepLock {
    private Object lock = new Object();

    private class ThreadSleep extends Thread{
        @Override
        public void run() {
            String threadName = Thread.currentThread().getName();
            System.out.println(threadName + " will take the lock!");
            try {
                synchronized(lock) {
                    System.out.println(threadName + " is taking the lock!");
                    Thread.sleep(5000);
                    System.out.println(threadName + "finish the work!");
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    private class ThreadNotSleep extends Thread{
        @Override
        public void run() {
            String threadName = Thread.currentThread().getName();
            System.out.println(threadName + " will take the lock time = " + System.currentTimeMillis());
            synchronized(lock) {
                System.out.println(threadName + " is taking the lock time = " + System.currentTimeMillis());
                System.out.println(threadName + " finish the work!");
            }
        }
    }


    public static void main(String[] args) {
        SleepLock sleepTest = new SleepLock();
        Thread threadA = sleepTest.new ThreadSleep();
        threadA.setName("ThreadSleep");
        Thread threadB = sleepTest.new ThreadNotSleep();
        threadB.setName("ThreadNotSleep");
        threadA.start();
        try {
            Thread.sleep(1000);
            System.out.println(" Main slept!");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        threadB.start();
    }
}