JAVA 채팅방 만들기 예제 (Client 측)

간단한 채팅방 만드는 예제입니다.

Server 측 코드는 바로가기에서 확인하시기 바랍니다.

학원 수업 자료인 관계로 코드 파일은 제공하지 않습니다.

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import java.awt.*;

import java.awt.List;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.EtchedBorder;

import java.io.*;

importjava.net.*;

public class ChatClient extends JFrame implements ActionListener, Runnable {

       private JLabel jLabel1 = new JLabel();

       private JTextField txtname = new JTextField();

       private JButton btnconn = new JButton();

       private JTextArea txtarea = new JTextArea();

       private JScrollPane jScrollPane1 = new JScrollPane();

       private JTextField txtsend = new JTextField();

       private JButton btnok = new JButton();

       private JLabel jLabel2 = new JLabel();

       private JLabel jLabel3 = new JLabel();

       private JLabel lblinwon = new JLabel();

       private JRadioButton radio1 = new JRadioButton();

       private JRadioButton radio2 = new JRadioButton();

       private JButton btnclose = new JButton();

       private List list = new List();

       private JButton btnchange = new JButton();

       private BufferedReader in;

       private OutputStream out;

       private Socket soc;

       int count = 0; // 접속 인원수

       public ChatClient() {

              try {

                     jbInit();

                     addListener();

              } catch (Exception e) {

                     e.printStackTrace();

              }

       }

       private void jbInit() throws Exception {

              this.getContentPane().setLayout(null);

              this.setSize(new Dimension(652, 264));

              this.setTitle("채팅 프로그램");

              this.setBackground(new Color(198, 214, 255));

              jLabel1.setText("대화명:");

              jLabel1.setBounds(new Rectangle(15, 10, 45, 25));

              txtname.setBounds(new Rectangle(60, 10, 105, 25));

              btnconn.setText("접속");

              btnconn.setBounds(new Rectangle(165, 10, 60, 25));

              jScrollPane1.setBounds(new Rectangle(15, 40, 495, 155));

              txtsend.setBounds(new Rectangle(15, 200, 435, 25));

              btnok.setText("확인");

              btnok.setBounds(new Rectangle(450, 200, 60, 25));

              jLabel2.setText("접속자 목록");

              jLabel2.setBounds(new Rectangle(520, 10, 75, 20));

              jLabel3.setText("인원:");

              jLabel3.setBounds(new Rectangle(530, 170, 35, 25));

              lblinwon.setText("0");

              lblinwon.setBounds(new Rectangle(565, 170, 50, 25));

              lblinwon.setBackground(new Color(198, 198, 200));

              lblinwon.setBorder(BorderFactory.createEtchedBorder(EtchedBorder.LOWERED));

              lblinwon.setHorizontalAlignment(SwingConstants.CENTER);

              lblinwon.setHorizontalTextPosition(SwingConstants.CENTER);

              radio1.setText("귓속말");

              radio1.setBounds(new Rectangle(345, 10, 70, 25));

              radio2.setText("귓속말해제");

              radio2.setBounds(new Rectangle(420, 10, 90, 25));

              btnclose.setText("나가기");

              btnclose.setBounds(new Rectangle(530, 200, 90, 25));

              list.setBounds(new Rectangle(525, 40, 110, 120));

              btnchange.setText("대화명 변경");

              btnchange.setBounds(new Rectangle(230, 10, 110, 25));

              ButtonGroup group = new ButtonGroup();

              group.add(radio1);

              group.add(radio2);

              this.getContentPane().add(btnchange, null);

              this.getContentPane().add(list, null);

              this.getContentPane().add(btnclose, null);

              this.getContentPane().add(radio1, null);

              this.getContentPane().add(radio2, null);

              this.getContentPane().add(lblinwon, null);

              this.getContentPane().add(jLabel3, null);

              this.getContentPane().add(jLabel2, null);

              this.getContentPane().add(btnok, null);

              this.getContentPane().add(txtsend, null);

              jScrollPane1.getViewport().add(txtarea, null);

              this.getContentPane().add(jScrollPane1, null);

              this.getContentPane().add(btnconn, null);

              this.getContentPane().add(txtname, null);

              this.getContentPane().add(jLabel1, null);

       }

       public void addListener() {

              txtname.addActionListener(this);

              txtsend.addActionListener(this);

              btnok.addActionListener(this);

              btnconn.addActionListener(this);

              btnclose.addActionListener(this);

              btnchange.addActionListener(this);

       }

       public void actionPerformed(ActionEvent e) {

              if(e.getSource() == txtname || e.getSource() == btnconn) {

                     //대화명 입력 후 접속

                     if(txtname.getText().equals("")) {

                           JOptionPane.showMessageDialog(this, "대화명 입력");

                           txtname.requestFocus();

                           return;

                     }

                     

                     try {

                           soc = new Socket("192.168.0.28", 7777);

                           in = new BufferedReader(

                                         new InputStreamReader(soc.getInputStream(), "euc-kr"));

                           out = soc.getOutputStream();

                           out.write((txtname.getText() + "\n").getBytes("euc-kr"));

                           new Thread(this).start();  //run()을 호출

                     } catch (Exception e2) {

                           System.out.println("접속 오류:" + e2);

                     }

              }else if(e.getSource() == txtsend || e.getSource() == btnok) {

                     //메세지 전송

                     try {

                           if(radio1.isSelected()) {  //귓속말 메세지

                                  String name = list.getSelectedItem();

                                  out.write(("/s" + name + "-" +

                                                       txtsend.getText() + "\n").getBytes("euc-kr"));

                                  txtarea.append(name + "님에게 귓속말이 전달되었습니다.\n");

                           }else {  //일반 메세지

                                  out.write((txtsend.getText() + "\n").getBytes("euc-kr"));

                           }

                           

                           txtsend.setText("");

                           txtsend.requestFocus();

                     } catch (Exception e2) {

                           System.out.println("메세지 전송 오류:" + e2);

                     }

              }else if(e.getSource() == btnchange) {

                     //대화명 변경

                     if(btnchange.getText().equals("대화명 변경")) {

                           btnchange.setText("변경확인");

                           txtname.setEditable(true);

                           txtname.requestFocus();

                     }else {

                           btnchange.setText("대화명 변경");

                           txtname.setEditable(false);

                           try {

                                  out.write(("/r" + txtname.getText() + "\n").getBytes("euc-kr"));

                           } catch (Exception e2) {

                                  System.out.println("대화명 변경 오류:" + e2);

                           }

                     }

              }else if(e.getSource() == btnclose) {

                     //나가기

                     try {

                           out.write(("/q\n").getBytes());

                           in.close();

                           out.close();

                           soc.close();

                     } catch (Exception e2) {

                           System.out.println("나가기 오류:" + e2);

                     } finally {

                           System.exit(0);

                     }

              }

       }

       

       @Override

       public void run() {

              while (true) {

                     try {

                           String msg = in.readLine();  //서버로부터 메세지 수신

                           

                           if(msg == null || msg.equals("")) return;

                           

                           if(msg.charAt(0) == '/') {

                                  if(msg.charAt(1) == 'c') { //대화명(입장)

                                         //  /c홍길동

                                         list.add(msg.substring(2), count);

                                         count++;

                                         lblinwon.setText(String.valueOf(count));

                                         txtarea.append("**" + msg.substring(2) + "님이 입장했습니다.\n");

                                         txtname.setEditable(false);  //대화명 입력 불가

                                         btnconn.setEnabled(false);

                                  }else if(msg.charAt(1) == 'q') { //퇴장

                                         txtarea.append("^^" + msg.substring(2) + "님이 퇴장했습니다.\n");

                                         String cname = msg.substring(2);

                                         

                                         for (int i = 0; i < count; i++) {

                                                if(cname.equals(list.getItem(i))) {

                                                       list.remove(i);

                                                       count--;

                                                       lblinwon.setText(String.valueOf(count));

                                                       break;

                                                }

                                         }

                                  }else if(msg.charAt(1) == 'r') { //대화명 변경

                                         //   /roldName-newName

                                         String oldName = msg.substring(2, msg.indexOf('-'));

                                         String newName = msg.substring(msg.indexOf('-') + 1);

                                         txtarea.append("*" + oldName + "님의 대화명이 " +

                                                       newName + "으로 변경됐습니다\n");

                                         

                                         for (int i = 0; i < count; i++) {

                                                if(oldName.equals(list.getItem(i))) {

                                                       list.replaceItem(newName, i);

                                                       break;

                                                }

                                         }

                                  }

                           }else { //일반 메세지

                                  txtarea.append(msg + "\n");

                           }

                     } catch (Exception e) {

                           System.out.println("run err : " + e);

                     }                    

              }

       }

       

       public static void main(String args[]) {

              ChatClient fr = new ChatClient();

              fr.getPreferredSize();

              fr.setLocation(200, 200);

              fr.setVisible(true);

              fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

       }

}

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본 포스팅은 IT 교육기관인 KIC 캠퍼스의 지원을 받은 리포트입니다.

혹시 잘못되거나 문제 소지시 댓글 남겨주시면 조치하겠습니다.

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