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

public class chatServer extends Frame implements ActionListener
{   Label label=new Label("聊天");
    Panel panel=new Panel( );
    TextField tf=new TextField(10);
    TextArea ta=new TextArea( );

    ServerSocket server;
    Socket client;
    InputStream in;
    OutputStream out;

    public chatServer( )
    {   super("服務器");
        setSize(250,250);
        panel.add(label);
        panel.add(tf);
        tf.addActionListener(this);
        add("North",panel);
        add("Center",ta);
        addWindowListener(new WindowAdapter( )
        {   public void windowCloseing(WindowEvent e)
            {   System.exit(0);}}  );
        show( );

        try
        {   server=new ServerSocket(5000);
            client=server.accept( );
            ta.append("已連接的客戶機:"+client.getInetAddress( ).getHostName( )+"\n\n");
            in=client.getInputStream( );
            out=client.getOutputStream( );
        }
        catch(IOException ioe) {   }

        while(true)
        {   try
            {   byte[ ] buf=new byte[256];
                in.read(buf);
                String str=new String(buf);
                ta.append("客戶機說："+str);
                ta.append("\n");
            }
            catch(IOException ioe) {   }
        }
    }
    public void actionPerformed(ActionEvent e)
    {   try
        {   String str=tf.getText( );
            byte[ ] buf=str.getBytes( );
            tf.setText(null);
            out.write(buf);
            ta.append("我說："+str);
            ta.append("\n");
        }
        catch(IOException ioe) {   }
    }
    public static void main(String args[ ])
    {   new chatServer( );
    }
}