자바 1:1 GUI 채팅 프로그램..

으음.. 일단 다중 클라이언트 접속은 구현을 안해봤다..책에 나온 예제를 풀었다...

package 챕25네트웤;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

class SFrame extends JFrame implements ActionListener{
	JButton button , but_input;
	JTextArea ta;
	JTextField tf; 
	
	//스태틱을 일단 많이 줬다...이래도 되는 걸까...흠..
	static ServerSocket serverSocket = null;
	static Socket clientSocket =null;
	static PrintWriter out;
	static BufferedReader in;
	static String inputLine, outputLine;	
		
	public SFrame(){
		setSize(500, 600);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setTitle("에코 서버");
		
		//패널1
		JPanel panel = new JPanel();
		button = new JButton("서버입니다!!");
		button.addActionListener(this);
		//패널2
		JPanel panel2 = new JPanel();
		ta = new JTextArea(30, 30);
		tf = new JTextField(30);
		but_input = new JButton("입력");
		but_input.addActionListener(this);
		
		panel2.add(button);
		panel.add(ta);
		panel.add(tf);
		panel.add(but_input);
		add(panel2, BorderLayout.NORTH);
		add(panel);
		setVisible(true);
		
	}

	@Override
	public void actionPerformed(ActionEvent arg0) {
		String s;
		s="서버 : "+tf.getText(); 
		if(arg0.getSource()==but_input){
			ta.append(s+"\n");
			out.println(s);
			tf.setText("");
		}
		if(arg0.getSource()==button){
			
		}
	}
	
	public  void serverStart() throws IOException{
		System.out.println("서버 시작!haha");
		
		try{
			serverSocket = new ServerSocket(5555);
		}catch(IOException e){
			System.out.println("다음의 포트 번호에 연결할 수 없습니다 : 5555");
			System.exit(1);
		}
		
		clientSocket = null;
		try{
			clientSocket = serverSocket.accept();
		}catch(IOException e){
			System.err.println("accept() 실패 ");
			System.exit(1);
		}
		
		out = new PrintWriter(clientSocket.getOutputStream(),true);
		in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
		
		outputLine = "서버 : 접속 환영합니다";
		out.println(outputLine);
		ta.append("서버 메시지 : 클라이언트가 접속되었습니다.\n");
		
		
		while((inputLine = in.readLine())!=null){
			String s =inputLine+"\n";
			System.out.println(s);
			ta.append(s);
			//outputLine = inputLine;
			//out.println(outputLine);
			if(outputLine.equals("quit"))
				break;
		}
	}
}
public class Gui_EchoServ {

	public static void main(String[] args) throws IOException {
		SFrame f = new SFrame();
		f.serverStart();
	}

}

밑에는 클라이언트 소스..

package 챕25네트웤;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

class ClientFrame extends JFrame implements ActionListener {
	JButton button, but_input;
	JTextArea ta;
	JTextField tf;

	// out , in 설정
	static PrintWriter out = null;
	static BufferedReader in = null;

	public ClientFrame() {
		setSize(500, 600);
		setTitle("클라이언트 채팅");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// 패널1
		JPanel panel = new JPanel();
		button = new JButton("클라이언트입니다!!");
		button.addActionListener(this);
		// 패널2
		JPanel panel2 = new JPanel();
		ta = new JTextArea(30, 30);
		tf = new JTextField(30);
		but_input = new JButton("입력");
		but_input.addActionListener(this);

		panel2.add(button);
		panel.add(ta);
		panel.add(tf);
		panel.add(but_input);
		add(panel2, BorderLayout.NORTH);
		add(panel);
		setVisible(true);
	}

	@Override
	public void actionPerformed(ActionEvent arg0) {
		if (arg0.getSource() == but_input) {
			String s = "클라이언트 : " + tf.getText();
			ta.append(s+"\n");
			out.println(s);
			tf.setText("");
		}
	}

	public void client() throws IOException {
		Socket socket = null;

		try {
			socket = new Socket("localhost", 5555);
			out = new PrintWriter(socket.getOutputStream(), true);
			in = new BufferedReader(new InputStreamReader(
					socket.getInputStream()));

		} catch (UnknownHostException e) {
			System.err.println("localhost에 접근할 수 없습니다.");
			System.exit(1);
		} catch (IOException eg) {
			System.err.println("입출력 오류11");
			System.exit(1);
		}
		

		String fromServer;
		

		while ((fromServer = in.readLine()) != null) {
			
			String s =fromServer+"\n";
			//System.out.println(s);
			ta.append(s);
			System.out.println(fromServer);
			if (fromServer.equals("quit"))
				break;
		}

		out.close();
		in.close();
		socket.close();
	}

}

public class Gui_EchoClient {

	public static void main(String[] args) throws IOException {
		ClientFrame f = new ClientFrame();
		f.client();

	}

}