import java.text.MessageFormat;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.concurrent.TimeUnit;

public class SleepState {

    public static ThreadLocal<SimpleDateFormat> threadLocal = new ThreadLocal<SimpleDateFormat>() {

        @Override

        protected SimpleDateFormat initialValue() {

            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSZ");

        }

    };

    private static final int[] lock = new int[0];

    public static void main(String[] args) throws InterruptedException {

        Thread thread1 = new Thread(new TestSynchronizedTask(lock, 1000 * 10), "Thread1");

        Thread thread2 = new Thread(new TestSynchronizedTask(lock, 10), "Thread2");

        Thread thread3 = new Thread(new TestSynchronizedTask(lock, 1000), "Thread3");

        thread1.start();

        TimeUnit.MILLISECONDS.sleep(1000);
thread2.start();

        TimeUnit.MILLISECONDS.sleep(1000);

        thread3.start();

    }

}

class TestSynchronizedTask implements Runnable {

    private final int[] lock;

    private int sleepMilliSeconds;

    public TestSynchronizedTask(int[] lock, int sleepMilliSeconds) {

        this.lock = lock;

        this.sleepMilliSeconds = sleepMilliSeconds;

    }

    public TestSynchronizedTask(int[] lock) {

        this(lock, 0);

    }

    @Override

    public void run() {

        synchronized (lock) {

            try {

                System.out.println(MessageFormat.format(" {0} {1}  begin", SleepState.threadLocal.get().format(new Date()), Thread.currentThread()));

                TimeUnit.MILLISECONDS.sleep(sleepMilliSeconds);

                System.out.println(MessageFormat.format("{0} {1}  will end", SleepState.threadLocal.get().format(new Date()), Thread.currentThread()));

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

        }

    }

}

执行结果：

 2016-05-26 13:31:44.260+0800 Thread[Thread1,5,main]  begin

2016-05-26 13:31:54.260+0800 Thread[Thread1,5,main]  will end

 2016-05-26 13:31:54.260+0800 Thread[Thread3,5,main]  begin

2016-05-26 13:31:55.260+0800 Thread[Thread3,5,main]  will end

 2016-05-26 13:31:55.260+0800 Thread[Thread2,5,main]  begin

2016-05-26 13:31:55.276+0800 Thread[Thread2,5,main]  will end