java Thread编程(二)sleep的使用

package com.robert.thread;

import java.util.Date;

public class TestThreadSleep implements Runnable{

	public static void main(String[] args) {
		
		TestThreadSleep runnable = new TestThreadSleep();
		Thread thread = new Thread(runnable);
		thread.start();
	}

	@Override
	public void run() {
		
		System.out.println("i am sleep for a while!");
		try {
			Date currentTime = new Date();
			long startTime = currentTime.getTime();
			Thread.sleep(4000);
			currentTime = new Date();
			long endTime = currentTime.getTime();
			System.out.println("休眠时间为："+(endTime-startTime)+"ms");
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
}