Java UDP聊天程序

同学网上找的代码，说会乱码。看了源码，没发现什么原因，运行起来对方发送过来的字符串确实是乱码的。同学用的NetBeans我用的Eclipse，而NetBeans默认的编码是UTF-8，Eclipse默认的是GBK；琢磨着就是这个引起的。。。。都改成一样的编码就没事了。代码如下：

packagetest;

importjava.awt.BorderLayout;
importjava.awt.List;
importjava.awt.TextField;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.io.IOException;
importjava.net.DatagramPacket;
importjava.net.DatagramSocket;
importjava.net.InetAddress;
importjava.net.SocketException;
importjava.net.UnknownHostException;

importjavax.swing.JFrame;
importjavax.swing.JPanel;

publicclassnetchat{

JFramejf=newJFrame("聊天窗口");
Listl=newList(6);
JPaneljp=newJPanel();
TextFieldtip=newTextField(15);
TextFieldtdata=newTextField(15);
DatagramSocketds;

//DatagramPacketdp;
publicnetchat(){
tip.setText("127.0.0.1");
try{
ds=newDatagramSocket(3000);
}catch(SocketExceptione){
e.printStackTrace();
}
newThread(newRunnable()

{
DatagramPacketdp;

publicvoidrun(){
byte[]buf=newbyte[1024];
dp=newDatagramPacket(buf,1024);
while(true){
try{
ds.receive(dp);
//l.add(dp.getAddress().getHostName()+"say:"+new
//String(buf,0,dp.getLength()),-1);
//l.add(dp.getAddress().getHostAddress()+"say:"+new
//String(buf,0,+dp.getLength()),-1);
System.out.println("aaaa");

Stringstr=newString(dp.getData(),0,dp.getLength());
System.out.println("数据1是："+str);

Stringstr2=newString(buf,0,dp.getLength());
System.out.println("数据2是："+str2);

l.add(dp.getAddress().getHostAddress()+"say:"+str,
-1);
}catch(IOExceptione){
e.printStackTrace();
}
}
}
}).start();

}

publicstaticvoidmain(String[]args){
newnetchat().init();
}

privatevoidinit(){
jf.add(l);
jp.add(tip,BorderLayout.WEST);
jp.add(tdata,BorderLayout.EAST);
jf.add(jp,BorderLayout.SOUTH);
jf.setSize(400,300);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

tdata.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
byte[]buf;

Stringstr222=e.getActionCommand();
buf=str222.getBytes();
System.out.println("ddd="+str222);
l.add("我说:"+str222,-1);
//buf=e.getActionCommand().getBytes();
DatagramPacketdp;

try{
dp=newDatagramPacket(buf,buf.length,InetAddress
.getByName(tip.getText()),3000);
ds.send(dp);
}catch(UnknownHostExceptione1){
e1.printStackTrace();
}catch(IOExceptione1){
e1.printStackTrace();
}
((TextField)e.getSource()).setText("");
}
});
}

}

运行结果就是一个小窗体。。。