WinChatClient.java

import java.awt.*;
import java.awt.event.*;

import java.net.*;
import java.io.*;
public class WinChatClient extends Frame implements ActionListener{
	private TextField idTF = null;
	private TextField input = null;
	private TextArea display = null;
	private CardLayout cardLayout = null;
	private BufferedReader br = null;
	private PrintWriter pw = null;
	private Socket sock = null;
	public WinChatClient(String ip){
		super("채팅 클라이언트");
		cardLayout = new CardLayout();
		setLayout(cardLayout);
		Panel loginPanel = new Panel();
		loginPanel.setLayout(new BorderLayout());
		loginPanel.add("North", new Label("아이디를 입력하여 주신후 엔터를 입력하여 주세요."));
		idTF = new TextField(20);
		idTF.addActionListener(this);
		Panel c = new Panel();
		c.add(idTF);
		loginPanel.add("Center", c);
		add("login", loginPanel);
		Panel main = new Panel();
		main.setLayout(new BorderLayout());
		input = new TextField();
		input.addActionListener(this);
		display = new TextArea();
		display.setEditable(false);
		main.add("Center", display);
		main.add("South", input);
		add("main", main);
		try{
			sock = new Socket(ip, 10001);
			pw = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
			br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
		}catch(Exception ex){
			System.out.println("서버와 접속시 오류가 발생하였습니다.");
			System.out.println(ex);
			System.exit(1);
		}
		setSize(500, 500);
		cardLayout.show(this, "login");
		addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				pw.println("/quit");
				pw.flush();
				try{
					sock.close();
				}catch(Exception ex){}
				System.out.println("종료합니다.");
				System.exit(0);
			}
		});
		setVisible(true);
	}


	public static void main(String[] args) {
		if(args.length != 1){
			System.out.println("사용법 : java WinChatClient ip");
			System.exit(1);
		}
		new WinChatClient(args[0]);
	}

	public void actionPerformed(ActionEvent e) {
		if(e.getSource() == idTF){
			String id = idTF.getText();
			if(id == null || id.trim().equals("")){
				System.out.println("아이디를 다시 입력하여 주세요.");
				return;
			}
			pw.println(id.trim());
			pw.flush();
			WinInputThread wit = new WinInputThread(sock, br);
			wit.start();
			cardLayout.show(this, "main");
			input.requestFocus();
		}else if(e.getSource() == input){
			String msg = input.getText();
			pw.println(msg);
			pw.flush();
			if(msg.equals("/quit")){
				try{
					sock.close();
				}catch(Exception ex){}
				System.out.println("종료합니다.");
				System.exit(1);
			}
			input.setText("");
			input.requestFocus();
		}
	} // actionPerformed


	class WinInputThread extends Thread{
		private Socket sock = null;
		private BufferedReader br = null;
		public WinInputThread(Socket sock, BufferedReader br){
			this.sock = sock;
			this.br = br;
		}
		public void run(){
			try{
				String line = null;
				while((line = br.readLine()) != null){
					display.append(line + "\n");
				}
			}catch(Exception ex){
			}finally{
				try{
					if(br != null)
						br.close();
				}catch(Exception ex){}
				try{
					if(sock != null)
						sock.close();
				}catch(Exception ex){}
			}
		} // InputThread
	} // WinInputThread end
} // WinChat Client class