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>() {@Overrideprotected 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);}@Overridepublic 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 end2016-05-26 13:31:54.260+0800 Thread[Thread3,5,main]  begin
2016-05-26 13:31:55.260+0800 Thread[Thread3,5,main]  will end2016-05-26 13:31:55.260+0800 Thread[Thread2,5,main]  begin
2016-05-26 13:31:55.276+0800 Thread[Thread2,5,main]  will end