//客戶端程序
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Date;
import java.net.*;
import java.io.*;

public class ChatRoom extends JFrame
{
    private JScrollPane sp;
    private JTextArea ta;
    private JTextField txt;
    private JPanel p1,p2;
    private JButton bt1,bt2;
    private String words;//保存輸入框內容
    private boolean t=false;//用來控制輸出

    Socket socket=null;
    BufferedReader br=null;
    PrintWriter pw=null;
    
    public ChatRoom(){
        super("ChatRoom");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container con=getContentPane();
        
        p1=new JPanel();
        bt1=new JButton("Send");
        bt2=new JButton("Close");
        p1.add(bt1);
        p1.add(bt2);
        
        p2=new JPanel();
        ta=new JTextArea(10,40);
        ta.setEditable(false);
        sp=new JScrollPane(ta);

        txt=new JTextField();
        
        con.add(p1,BorderLayout.EAST);
        con.add(sp,BorderLayout.WEST);
        con.add(txt,BorderLayout.SOUTH);


        this.pack();
        setVisible(true);
        
        ActionListener listener1=new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                JButton bt=(JButton)e.getSource();
                try{
                if(bt==bt2){
                if(socket != null)socket.close();
                System.exit(0);}
            }catch(Exception ee){ee.printStackTrace();}
            }
        };
        bt2.addActionListener(listener1);

        try{
            socket = new Socket("localhost", 3000);
            InputStream is = socket.getInputStream();
            
            InputStreamReader isr = new InputStreamReader(is);
            br = new BufferedReader(isr);
            OutputStream os = socket.getOutputStream();
            pw = new PrintWriter(os, true);
            
            ActionListener listener2=new ActionListener(){
            public void actionPerformed(ActionEvent e){
                if(e.getSource()==bt1||e.getSource()==txt){
                words=txt.getText();
                pw.println(socket.getInetAddress()+": "+words);
                txt.setText("");
                }                
            }
        };
        bt1.addActionListener(listener2);
        txt.addActionListener(listener2);
        while(true){
            String data = br.readLine();
            ta.setText(ta.getText()+"\n"+data);
            }
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            try{    if(pw !=null)pw.close();
                if(br != null)br.close();
                if(socket != null)socket.close();
            }catch(Exception e){
                e.printStackTrace();
            }
        }
        

    }
    
    public static void main(String args[]){
        new ChatRoom();
    
    }    
}