發信人: jallon (javaFan), 信區: JAVA 

標  題: 源碼公布1 

發信站: 華南網木棉站 (Sun Nov 30 19:49:04 1997), 轉信 

  

客戶端Java Applet: 

import java.applet.*; 

import java.awt.*; 

import java.net.*; 

import java.io.*; 

  

public final class JavaChatApplet extends Applet 

{ 

        private Label l1,l2; 

        private Panel p1,p2; 

        private TextField tf; 

        private TextArea ta; 

        private DatagramPacket sendPacket,receivePacket; 

        private DatagramSocket sendSocket,receiveSocket; 

  

        public void init() 

        { 

                setBackground(Color.yellow); 

                setLayout(new BorderLayout()); 

                p1=new Panel(); 

                p1.setLayout(new BorderLayout()); 

                l1=new Label("Our chatting as follows:"); 

                ta=new TextArea(10,20); 

                ta.setText("Jallon say:\tI'm jallon and glad to see u."+ 

                        "\n\t\t"+"If u can't connect me, it means that i'm busy 

alking to a lady" 

                        +"\n\t\t"+"wait a moment...Connect again?!\n"); 

                p1.add("North",l1); 

                p1.add("Center",ta); 

                add("North",p1); 

                p2=new Panel(); 

                p2.setLayout(new BorderLayout()); 

                l2=new Label("Guest speak now:"); 

                p2.add("Center",l2); 

                tf=new TextField(20); 

                tf.setText(""); 

                p2.add("South",tf); 

                add("Center",p2); 

                show(); 

        } 

  

        public void start() 

        { 

                waitForPackets(); 

        } 

  

        public void waitForPackets() 

        { 

                try{ 

                        sendSocket=new DatagramSocket(); 

                        receiveSocket=new DatagramSocket(5001); 

                } 

                catch(SocketException se) 

                {} 

                while(true) 

                { 

                        try{ 

                                byte array[]=new byte[100]; 

                                receivePacket=new DatagramPacket(array,array.len 

th); 

                                receiveSocket.receive(receivePacket); 

                                ta.appendText("\nJallon Say:\t"); 

                                byte data[]=receivePacket.getData(); 

                                String received=new String(data,0); 

                                ta.appendText(received); 

                        } 

                        catch(IOException ioe) 

                        { 

                                ta.appendText("sorry, can't get through...\n"); 

                                ta.appendText("problem lies at "+ioe.toString()+ 

wait and connect again...\n"); 

                        } 

                } 

        } 

  

        public boolean action(Event e,Object o) 

        { 

                try{ 

                        ta.appendText("\nGuest 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("202.38.214.236"),5000); 

                        sendSocket.send(sendPacket); 

                } 

                catch(IOException ioe) 

                { 

                        ta.appendText("sorry, net suddently wrong???\n"); 

                        ta.appendText("problem lies at "+ioe.toString()+"wait an 

 connect again...\n"); 

                } 

                return true; 

        } 

} 

  

  

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