java chat applet -- server i.txt

一些网上收集的或是作者本人写的值得推荐的源程序代码.

发信人: jallon (javaFan), 信区: JAVA 
标  题: 源码公布2 
发信站: 华南网木棉站 (Sun Nov 30 19:50:42 1997), 转信 
  
服务器端： 
import java.awt.*; 
import java.io.*; 
import java.net.*; 
import java.applet.Applet; 
  
public final class ChatServerFrame extends Frame 
{ 
        private Label l1,l2; 
        private Panel p1,p2; 
        private TextField tf; 
        private TextArea ta; 
        private String jennifer,jennifer1; 
  
        private DatagramPacket sendPacket,receivePacket; 
        private DatagramSocket sendSocket,receiveSocket; 
  
        public ChatServerFrame() 
        { 
                super("Server Frame"); 
                p1=new Panel(); 
                p1.setLayout(new BorderLayout()); 
                l1=new Label("Our chatting as follows:"); 
                ta=new TextArea(10,20); 
                ta.setText(""); 
                p1.add("North",l1); 
                p1.add("Center",ta); 
                add("North",p1); 
                p2=new Panel(); 
                p2.setLayout(new BorderLayout()); 
                l2=new Label("I speak now:"); 
                p2.add("Center",l2); 
                tf=new TextField(20); 
                tf.setText(""); 
                p2.add("South",tf); 
                add("Center",p2); 
                resize(450,260); 
                show(); 
  
                try{ 
                        sendSocket=new DatagramSocket(); 
                        receiveSocket=new DatagramSocket(5000); 
                } 
                catch(SocketException se) 
                { 
                        se.printStackTrace(); 
                        System.exit(1); 
                } 
        } 
  
        public void waitForPackets() 
        { 
                while(true) 
                { 
                        try{ 
                                byte array[]=new byte[100]; 
                                receivePacket=new DatagramPacket(array,array.len 
th); 
                                receiveSocket.receive(receivePacket); 
                                jennifer=receivePacket.getAddress().toString(); 
                                if(jennifer1!=jennifer) 
                                { 
                                        sound(); 
                                    ta.appendText("\nFrom Host: "+jennifer+"\nHo 
t Port: "+receivePacket.getPort()); 
                                } 
                                ta.appendText("\nGuest Say:\t"); 
                                byte data[]=receivePacket.getData(); 
                                String received=new String(data,0); 
                                ta.appendText(received); 
                                jennifer1=jennifer; 
                        } 
                        catch(IOException ioe) 
                        { 
                                ta.appendText("\nProblem lies at "+ioe.toString( 
); 
                        } 
                } 
        } 
  
    public boolean handleEvent(Event e) 
        { 
                if(e.id==Event.WINDOW_DESTROY) 
                { 
                        hide(); 
                    dispose(); 
                        System.exit(0); 
                } 
                return super.handleEvent(e); 
        } 
  
        public boolean action(Event e,Object o) 
        { 
                try{ 
                        ta.appendText("\nJallon Say:\t"); 
                        String s=o.toString(); 
                        ta.appendText(s); 
                        byte data[]=new byte[100]; 
                        s.getBytes(0,s.length(),data,0); 
                        sendPacket=new DatagramPacket(data,s.length(),InetAddres 
.getByName(jennifer),5001); 
                        sendSocket.send(sendPacket); 
                } 
                catch(IOException ioe) 
                { 
                        ta.appendText("problem lies at "+ioe.toString()); 

                } 
                return true; 
        } 
  
        public void sound() 
        { 
        } 
} 
  
  
  
  
--