server.java

聊天,基于UDP的聊天程序,此程序是服务端,

///服务器界面

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;

public class Server extends Frame
{
    TextField tf=new TextField(20);
    TextArea ta=new TextArea();
    Button send=new Button("发 送");
    //Button voiceChat=new Button("voiceChat");
    ServerSocket serSocket;
    Socket client;
    InputStream in;
    BufferedReader br;
    OutputStream out;
    BufferedWriter bw;
    public Server()
    { 
        super("Server");
        add("North",tf);
        add("Center",ta);
        add("South",send);
       // add("East",voiceChat);
        setBackground(Color.yellow);
        setSize(250,250);
        show();
        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                dispose();
                System.exit(0);
            }
        }
        );
        try
        {
            ServerSocket serSocket=new ServerSocket(5000);
            client=serSocket.accept();
            ta.append("client host"+client.getInetAddress().getHostName()+"\n\n");
           in=client.getInputStream();
            br=new BufferedReader(new InputStreamReader(in));
            out=client.getOutputStream();
            bw=new BufferedWriter(new OutputStreamWriter(out));
        }
        catch(Exception e)
        {System.out.print(e.getMessage());
        }
        while(true)
        {
            try
            {
                byte[] buf=new byte[200];
                
                in.read(buf);
                String str=new String(buf);
                ta.append("Client say:"+str);
                ta.append("\n");
            }
            catch(IOException e)
            {System.out.print(e.getMessage());
            }
        }
    }
    public boolean action(Event evt, Object arg)
    {
        if(evt.target.equals(send))
        {
            try
            {
                String str=tf.getText();
                byte[] buf=str.getBytes();
                tf.setText(null);
                out.write(buf);
                ta.append("I say:"+str);     ta.append("\n");
            }
            catch(IOException ioe)
            {System.out.print(ioe.getMessage());
            }
        }
       
        return true;
        
    }
    
    public static void main(String[] args)
    {
        Server server=new Server();
    }
}