有关定时器的问题！在线等待！

Question

弄个线程，程序开始的时候让它运行，运行起来就sleep7分钟，醒了就通知，呵呵。

Answer 1

thread.sleep(7000);
//sound
thread.sleep(1000);
//sound精确到毫秒！

Answer 2

import java.awt.*;
import java.awt.event.*;
import java.applet.*;public class applet7 extends Applet implements Runnable
{
        Image memoryimage;
        Graphics memorygraphics;
        Thread doublebufferthread;
        boolean animateFlag = true;
        long t=System.currentTimeMillis();
        double d;
        //Initialize the applet
        public void init()
        {
                memoryimage = createImage(100,100);
                memorygraphics = memoryimage.getGraphics();
        }        public void start()
        {
                doublebufferthread = new Thread(this);
                doublebufferthread.start();
        }        public void stop()
        {
                animateFlag = false;
        }        public void run()
        {
                try
                {
                  while(true) {
                    Thread.sleep(100);
                    long t1=System.currentTimeMillis();
                    d=(double)(t1-t)/1000;
                    repaint();
                    if(d>=10)//这里设置到时时间，这里为10秒
                      break;
                  }
                  this.getToolkit().beep();//这里发出提示的声音
                  javax.swing.JOptionPane.showMessageDialog(this.getParent(),"时间到!");
                }
                catch(InterruptedException e)
                {                }
        }        public void paint(Graphics g)
        {
          g.drawString(String.valueOf(d),100,100);
        }
}