rdt3.0發送方程式(Java實現)

這個是在參考了下老師給的代碼^_^.比淩晨發的那個C實現的在介面上要友好很多..而且個人感覺更清晰...

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;

     /* 輸入要發送的資料 */  
     input = JOptionPane.showInputDialog("input the sending data!");
     /* 為發送的資料包註冊相應的時鐘監聽器 */ 
     Timer aTimer = new Timer(5000 , new SenderListener(input , counter%2));
     /* 啟動時鐘監聽器 */
     aTimer.start();
    
     do
     {
      /* 接收回應方的相關資訊 */
 configure = answerToSender();
 while(true)
 {
    /* 如果資料包已經成功接收,則終止相應的時鐘監聽器
    /* 否則資料包重發,時鐘監聽器繼續監聽 */
    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);
  }
}

/*　實現了ActionListener監聽器介面的自訂類,在該類中必須實現
　　ActionListener介面中的actionPerformed(ActionEvent)方法,該
　　方法在時間間隔到達你所定義的時間間隔時會被自動調用　*/
class SenderListener implements ActionListener
{
   private String series;
   private int sequenceNumber;

   /* 構造器,在對象初始化時被調用 */ 
   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"); 
   }
}