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java UDPģʽͨѶʵÀý javaѧϰ±Ê¼Ç(5)

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ÏÂÃæÊÇÒ»¸öÓÃjavaʵÏÖµÄÁÄÌìͨѶµÄ³ÌÐòʵÀý:
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class UDPSendThread extends Thread {//ÓÉÏß³ÌÀ´ÊµÏÖ
public DatagramPacket dp = null;//Êý¾Ý±¨°ü..
public DatagramSocket ds = null; //Êý¾Ý±¨°üµÄÌ×½Ó×Ö..
UDPSendThread(DatagramPacket dp, DatagramSocket ds) {
this.dp = dp;
this.ds = ds;
this.start();
}
@Override
public void run() {
try {
BufferedReader keyIn = new BufferedReader(new InputStreamReader(System.in));//Óû§ÊäÈëÊý¾Ý
String s;
while (true) {
s = keyIn.readLine();//×èÈû³ÌÐò..Ö±µ½Óû§ÊäÈëÐÅÏ¢
dp.setData(s.getBytes());//ÓÃÓû§ÊäÈëµÄÐÅÏ¢À´ÉèÖÃÊý¾Ý±¨°ü
System.out.println("You: "+s);
ds.send(dp);//ÓÃÊý¾Ý±¨°üµÄÌ×½Ó×ÖÀ´·¢ËÍÊý¾Ý±¨°ü..
if ( s.trim().equals("BYE") ) break;//Èç¹ûÓû§ÊäÈëÐÅϢΪ"BYE"Ôò½áÊøÍ¨ÐÅ..
}
keyIn.close();
ds.close();
}
catch(Exception e) {
System.out.println("Error: Send: "+e);
}
}

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class UDPRecvThread extends Thread {//Ïß³ÌʵÏÖ
public DatagramPacket dp = null;//Êý¾Ý±¨°ü
public DatagramSocket ds = null; //Êý¾Ý±¨°üµÄÌ×½Ó×Ö
UDPRecvThread(DatagramPacket dp, DatagramSocket ds) {
this.dp = dp;
this.ds = ds;
this.start();
}
@Override
public void run() {
try {


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