这个是在参考了下老师给的代码^_^.比凌晨发的那个C实现的在界面上要友好很多..而且个人感觉更清晰...

import javax.swing.*;

import java.awt.event.*;

import javax.swing.Timer;

public class Sender

{

public static void main(String [] args)

{

String input;

int counter = 0;

int configure;

/* 输入要发送的数据 */

input = JOptionPane.showInputDialog("input the sending data!");

/* 为发送的数据包注册相应的时钟监听器 */

Timer aTimer = new Timer(5000 , new SenderListener(input , counter%2));

/* 启动时钟监听器 */

aTimer.start();

do

{

/* 接收回应方的相关信息 */

configure = answerToSender();

while(true)

{

/* 如果数据包已经成功接收,则终止相应的时钟监听器

/* 否则数据包重发,时钟监听器继续监听 */

if(configure == counter%2)

{

aTimer.stop();

break;

}

else configure = answerToSender();

}

input = JOptionPane.showInputDialog("continue?(Y/N)");

if(input.equals("N") || input.equals("n")) break;

input = JOptionPane.showInputDialog("input the sending data!");

aTimer = new Timer(5000 , new SenderListener(input , ++counter%2));

aTimer.start();

}while(true);

System.exit(0);

}

public static int answerToSender()

{

String input = JOptionPane.showInputDialog("response to sender(0/1)");

return Integer.parseInt(input);

}

}

/*　实现了ActionListener监听器接口的自定义类,在该类中必须实现

ActionListener接口中的actionPerformed(ActionEvent)方法,该

方法在时间间隔到达你所定义的时间间隔时会被自动调用　*/

class SenderListener implements ActionListener

{

private String series;

private int sequenceNumber;

/* 构造器,在对象初始化时被调用 */    public SenderListener(String series ,int counter)   {      this.series = series;       sequenceNumber = counter;      System.out.println("the datas: '" + series + "' have been sended!/n"     + "          " + " and its sequence number is: " + sequenceNumber + "/n");    }    public void actionPerformed(ActionEvent aevent)   {      System.out.println("the datas: '" + series + "' recieved failurely!");      sendAgain();   }    public void sendAgain()   {      System.out.println("the datas: '" + series + "' have been sended again!/n");    }}