(Java) 聊天室

1. Server(伺服器端) :  
2.   
3. /* 
4.  * To change this license header, choose License Headers in Project Properties. 
5.  * To change this template file, choose Tools | Templates 
6.  * and open the template in the editor. 
7.  */  
8. package chats_.multi;  
9.   
10. import java.io.BufferedReader;  
11. import java.io.IOException;  
12. import java.io.InputStreamReader;  
13. import java.io.PrintWriter;  
14. import java.net.ServerSocket;  
15. import java.net.Socket;  
16. import java.net.SocketException;  
17. import java.util.ArrayList;  
18. import java.util.LinkedList;  
19. import  java.util.*;  
20. import java.util.logging.Level;  
21. import java.util.logging.Logger;  
22. import javax.swing.DefaultListModel;  
23. import javax.swing.JOptionPane;  
24.   
25. /** 
26.  * 
27.  * @author 1 
28.  */  
29. public class Server extends javax.swing.JFrame {  
30.   LinkedList clientOutputStreams;  
31.   LinkedList<String> users;  
32.     public Server() {  
33.         initComponents();  
34.     }  
35. public class ClinetHandler implements Runnable{  
36.   Socket socket ;  
37.   PrintWriter out ;  
38.   BufferedReader in ;   
39.     public  ClinetHandler(Socket s , PrintWriter o){  
40.       try {  
41.           socket = s ;  
42.           out = o ;  
43.           in = new BufferedReader(new InputStreamReader(s.getInputStream()));            
44.       } catch (IOException ex) {  
45.           System.out.println("ERROR");  
46.       }  
47.      }  
48.         @Override  
49.         public void run() {  
50.             String mess ;  
51.             String conn = "連接";  
52.             String exit = "離開";  
53.             String chat = "聊天";  
54.             String[] data;  
55.             String username = "";  
56.             try{  
57.                 while((mess = in.readLine()) != null){  
58.                      jTextArea1.append(" 收到 : "+ mess + " \n");  
59.                      data = mess.split(":");  
60.                      username = data[0];  
61.                      if(data[2].equals(conn)){  
62.                          telleveryone(data[0]+":"+data[1]+":"+chat);  
63.                          telleveryone("::重置");  
64.                          addUeser(data[0]);  
65.                      }else if(data[2].equals(exit)){  
66.                          telleveryone(data[0]+":"+data[1]+":"+chat);  
67.                          telleveryone("::重置");  
68.                          removeUeser(data[0]);  
69.                      }else if(data[2].equals(chat)){  
70.                          telleveryone(mess);  
71.                      }else{  
72.                          jTextArea1.append(" 沒有滿足條件 \n");  
73.                      }  
74.                 }  
75.               
76.             }catch(Exception e){/*/**/  
77.                 try {  
78.                     socket.close();  
79.                     jTextArea1.append(" 失去一個使用者連線 \n");  
80.                    // e.printStackTrace();  
81.                     clientOutputStreams.remove(out);  
82.                     telleveryone("::重置");  
83.                     removeUeser(username);  
84.                 } catch (IOException ex) {  
85.                     ex.printStackTrace();  
86.                     JOptionPane.showMessageDialog(null, "關閉錯誤....");  
87.                     System.exit(-1);  
88.                 }  
89.             }  
90.         }  
91.   
92.          
93.       
94.   }  
95.           
96.         private void show_Online_users(){  
97.             DefaultListModel n = new  DefaultListModel();  
98.             for(String user : users)  
99.                 n.addElement(user);  
100.              Users1.setModel(n);  
101.         }  
102.         private void telleveryone(String mess) {  
103.          Iterator  users = clientOutputStreams.iterator() ; //收納至users  
104.          while(users.hasNext()){  
105.              PrintWriter writer = (PrintWriter) users.next() ;  
106.             // jTextArea1.append(mess + "\n");  
107.              writer.println(mess);  
108.              writer.flush();     
109.          }  
110.         }  
111.   
112.         private void addUeser(String username) {  
113.             users.add(username);  
114.             jTextArea1.append(" 使用者 : "+ username + " 加入聊天室\n");  
115.             show_Online_users();  
116.             for(String u : users)  
117.             telleveryone(u+": :連接");  
118.         }  
119.   
120.         private void removeUeser(String username) {  
121.             users.remove(username);  
122.             show_Online_users();  
123.             jTextArea1.append(" 使用者 : "+ username + " 已經退出聊天室\n");  
124.             for(String u : users)  
125.             telleveryone(u+": :連接");  
126.         }  
127.    public class ServerStart implements Runnable {//執行諸 負責二次按鈕  
128.             
129.           @Override  
130.           public void run() {  
131.               clientOutputStreams = new LinkedList();  
132.               users = new  LinkedList();    
133.               try{  
134.                  ServerSocket ss = new ServerSocket(7788);   
135.                  while(true){  
136.                    Socket s =  ss.accept() ; //等待使勇者連上來  
137.                    PrintWriter p  = new PrintWriter(s.getOutputStream(),true); //Autoflush true  
138.                    clientOutputStreams.add(p) ;  
139.                    new Thread(new ClinetHandler(s , p )).start();  
140.                    jTextArea1.append(" 連接到一個使用者\n");  
141.                  }  
142.               }catch(Exception e){  
143.                   e.printStackTrace();  
144.                   JOptionPane.showMessageDialog(null, "連結錯誤", "訊息" , JOptionPane.ERROR_MESSAGE);  
145.               }  
146.           }  
147.       
148.        }  
149.     @SuppressWarnings("unchecked")  
150.     // <editor-fold defaultstate="collapsed" desc="Generated Code">                            
151.     private void initComponents() {  
152.   
153.         jSeparator1 = new javax.swing.JSeparator();  
154.         jScrollPane1 = new javax.swing.JScrollPane();  
155.         jTextArea1 = new javax.swing.JTextArea();  
156.         jPanel1 = new javax.swing.JPanel();  
157.         ONLINE_USERS = new javax.swing.JButton();  
158.         CLEAR = new javax.swing.JButton();  
159.         BUILLD = new javax.swing.JButton();  
160.         ENDBUT = new javax.swing.JButton();  
161.         jScrollPane2 = new javax.swing.JScrollPane();  
162.         Users1 = new javax.swing.JList<>();  
163.         jLabel1 = new javax.swing.JLabel();  
164.   
165.         setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);  
166.         setTitle("伺服器控制台");  
167.         setMaximumSize(new java.awt.Dimension(465, 575));  
168.         setMinimumSize(new java.awt.Dimension(465, 575));  
169.         setPreferredSize(new java.awt.Dimension(465, 575));  
170.         setResizable(false);  
171.         getContentPane().setLayout(null);  
172.   
173.         jTextArea1.setBackground(new java.awt.Color(153, 153, 153));  
174.         jTextArea1.setColumns(20);  
175.         jTextArea1.setFont(new java.awt.Font("MS PGothic", 1, 14)); // NOI18N  
176.         jTextArea1.setRows(5);  
177.         jTextArea1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0), 4));  
178.         jScrollPane1.setViewportView(jTextArea1);  
179.   
180.         getContentPane().add(jScrollPane1);  
181.         jScrollPane1.setBounds(10, 10, 343, 405);  
182.   
183.         jPanel1.setBackground(new java.awt.Color(102, 102, 102));  
184.         jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(153, 153, 153)));  
185.         jPanel1.setLayout(new java.awt.GridLayout(2, 2));  
186.   
187.         ONLINE_USERS.setBackground(new java.awt.Color(255, 255, 255));  
188.         ONLINE_USERS.setFont(new java.awt.Font("微軟正黑體", 1, 14)); // NOI18N  
189.         ONLINE_USERS.setText("使用者剔除");  
190.         ONLINE_USERS.setBorder(javax.swing.BorderFactory.createEtchedBorder(javax.swing.border.EtchedBorder.RAISED));  
191.         ONLINE_USERS.addActionListener(new java.awt.event.ActionListener() {  
192.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
193.                 ONLINE_USERSActionPerformed(evt);  
194.             }  
195.         });  
196.         jPanel1.add(ONLINE_USERS);  
197.   
198.         CLEAR.setBackground(new java.awt.Color(255, 255, 255));  
199.         CLEAR.setFont(new java.awt.Font("微軟正黑體", 1, 14)); // NOI18N  
200.         CLEAR.setText("刪除訊息");  
201.         CLEAR.setBorder(javax.swing.BorderFactory.createEtchedBorder(javax.swing.border.EtchedBorder.RAISED));  
202.         CLEAR.addActionListener(new java.awt.event.ActionListener() {  
203.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
204.                 CLEARActionPerformed(evt);  
205.             }  
206.         });  
207.         jPanel1.add(CLEAR);  
208.   
209.         BUILLD.setBackground(new java.awt.Color(255, 255, 255));  
210.         BUILLD.setFont(new java.awt.Font("微軟正黑體", 1, 14)); // NOI18N  
211.         BUILLD.setText("建立");  
212.         BUILLD.setBorder(javax.swing.BorderFactory.createEtchedBorder(javax.swing.border.EtchedBorder.RAISED));  
213.         BUILLD.addActionListener(new java.awt.event.ActionListener() {  
214.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
215.                 BUILLDActionPerformed(evt);  
216.             }  
217.         });  
218.         jPanel1.add(BUILLD);  
219.   
220.         ENDBUT.setBackground(new java.awt.Color(255, 255, 255));  
221.         ENDBUT.setFont(new java.awt.Font("微軟正黑體", 1, 14)); // NOI18N  
222.         ENDBUT.setText("中止");  
223.         ENDBUT.setBorder(javax.swing.BorderFactory.createEtchedBorder(javax.swing.border.EtchedBorder.RAISED));  
224.         ENDBUT.addActionListener(new java.awt.event.ActionListener() {  
225.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
226.                 ENDBUTActionPerformed(evt);  
227.             }  
228.         });  
229.         jPanel1.add(ENDBUT);  
230.   
231.         getContentPane().add(jPanel1);  
232.         jPanel1.setBounds(10, 430, 340, 100);  
233.   
234.         Users1.setBackground(new java.awt.Color(153, 153, 153));  
235.         Users1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0), 3));  
236.         Users1.setFont(new java.awt.Font("微軟正黑體", 1, 18)); // NOI18N  
237.         jScrollPane2.setViewportView(Users1);  
238.   
239.         getContentPane().add(jScrollPane2);  
240.         jScrollPane2.setBounds(360, 10, 90, 410);  
241.   
242.         jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/chats_/multi/phone-icon.png"))); // NOI18N  
243.         jLabel1.setText("jLabel1");  
244.         getContentPane().add(jLabel1);  
245.         jLabel1.setBounds(370, 440, 80, 90);  
246.   
247.         pack();  
248.     }// </editor-fold>                          
249.   
250.     private void BUILLDActionPerformed(java.awt.event.ActionEvent evt) {                                         
251.      Thread start = new Thread(new ServerStart());  
252.      start.start();  
253.      jTextArea1.append(" 建立成功.....");  
254.     }                                        
255.   
256.     private void CLEARActionPerformed(java.awt.event.ActionEvent evt) {                                        
257.         jTextArea1.setText("");  
258.     }                                       
259.   
260.     private void ENDBUTActionPerformed(java.awt.event.ActionEvent evt) {                                         
261.       try {  
262.           Thread.sleep(10000);//使執行諸休息10SEC  
263.       } catch (InterruptedException ex) {  
264.          Thread.currentThread().interrupt();  
265.       }  
266.       jTextArea1.append("伺服器中斷回應......");  
267.       telleveryone("伺服器已中斷回應......");  
268.       jTextArea1.setText(" ");  
269.     }                                        
270.   
271.     private void ONLINE_USERSActionPerformed(java.awt.event.ActionEvent evt) {                                               
272.          System.out.print(Users1.getSelectedValue());  
273.         telleveryone(Users1.getSelectedValue()+"::離開");  
274.     }                                              
275.   
276.       
277.     public static void main(String args[]) {  
278.         /* Set the Nimbus look and feel */  
279.         //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">  
280.         /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
281.          * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html  
282.          */  
283.         try {  
284.             for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {  
285.                 if ("Nimbus".equals(info.getName())) {  
286.                     javax.swing.UIManager.setLookAndFeel(info.getClassName());  
287.                     break;  
288.                 }  
289.             }  
290.         } catch (ClassNotFoundException ex) {  
291.             java.util.logging.Logger.getLogger(Server.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
292.         } catch (InstantiationException ex) {  
293.             java.util.logging.Logger.getLogger(Server.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
294.         } catch (IllegalAccessException ex) {  
295.             java.util.logging.Logger.getLogger(Server.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
296.         } catch (javax.swing.UnsupportedLookAndFeelException ex) {  
297.             java.util.logging.Logger.getLogger(Server.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
298.         }  
299.         //</editor-fold>  
300.   
301.         /* Create and display the form */  
302.         java.awt.EventQueue.invokeLater(new Runnable() {  
303.             public void run() {  
304.                 new Server().setVisible(true);  
305.             }  
306.         });  
307.     }  
308.   
309.     // Variables declaration - do not modify                       
310.     private javax.swing.JButton BUILLD;  
311.     private javax.swing.JButton CLEAR;  
312.     private javax.swing.JButton ENDBUT;  
313.     private javax.swing.JButton ONLINE_USERS;  
314.     private javax.swing.JList<String> Users1;  
315.     private javax.swing.JLabel jLabel1;  
316.     private javax.swing.JPanel jPanel1;  
317.     private javax.swing.JScrollPane jScrollPane1;  
318.     private javax.swing.JScrollPane jScrollPane2;  
319.     private javax.swing.JSeparator jSeparator1;  
320.     private javax.swing.JTextArea jTextArea1;  
321.     // End of variables declaration                     
322. }  
323.   
324. clinet(使用者端) :  
325.   
326. import java.io.BufferedReader;  
327. import java.io.IOException;  
328. import java.io.InputStreamReader;  
329. import java.io.PrintWriter;  
330. import java.net.Socket;  
331. import java.util.*;  
332. import java.util.logging.Level;  
333. import java.util.logging.Logger;  
334. import javax.swing.ImageIcon;  
335. import javax.swing.JOptionPane;  
336.   
337. /* 
338.  * To change this license header, choose License Headers in Project Properties. 
339.  * To change this template file, choose Tools | Templates 
340.  * and open the template in the editor. 
341.  */  
342.   
343. /** 
344.  * 
345.  * @author 1 
346.  */  
347. public class Clinet extends javax.swing.JFrame {  
348.     String IP ;  
349.     LinkedList<String> users = new LinkedList();  
350.     int port = 7788;  
351.     Boolean isConnected = false;  
352.     Socket socket;  
353.     BufferedReader in;  
354.     PrintWriter out;  
355.     String username;  
356.     public Clinet() {  
357.         initComponents();  
358.     }  
359.     public void IncomingReader(){  
360.        new Thread(new IncomingReader()).start();  
361.     }  
362.     public class IncomingReader implements Runnable{  
363.        String[] data;  
364.        String conn = "連接";  
365.        String exit = "離開";  
366.        String chat = "聊天";  
367.        String reset = "重置";  
368.        String mess , closeData = "";  
369.         @Override  
370.         public void run() { //收取伺服器MESS執行諸  
371.            try {  
372.                while ((mess = in.readLine()) != null) {  
373.                     data = mess.split(":");  
374.                      if(data[2].equals(conn)){//連接  
375.                          users.add(data[0]);//加入成員  
376.                      }else if(data[2].equals(exit)&&data[0].equals(username)){//離開  
377.                          sendExit();  
378.                          Disconnect();  
379.                      }else if(data[2].equals(chat)){//訊息  
380.                          jTextArea1.append(data[0]+":"+ data[1] +"\n");  
381.                      }else if(data[2].equals(reset)){//重置成員  
382.                          users = new LinkedList();  
383.                      }else{  
384.                          jTextArea1.append("沒有滿足條件 \n");  
385.                      }  
386.                }  
387.            } catch (IOException ex) {  
388.                ex.printStackTrace();  
389.                JOptionPane.showMessageDialog(null , "伺服器關閉...." , "訊息" , JOptionPane.WARNING_MESSAGE);  
390.            }  
391.         }  
392.     }  
393.     @SuppressWarnings("unchecked")  
394.     // <editor-fold defaultstate="collapsed" desc="Generated Code">                            
395.     private void initComponents() {  
396.   
397.         jTextField1 = new javax.swing.JTextField();  
398.         jScrollPane1 = new javax.swing.JScrollPane();  
399.         jTextArea1 = new javax.swing.JTextArea();  
400.         jButton1 = new javax.swing.JButton();  
401.         jButton2 = new javax.swing.JButton();  
402.         jLabel2 = new javax.swing.JLabel();  
403.         jButton3 = new javax.swing.JButton();  
404.         jTextField2 = new javax.swing.JTextField();  
405.         jButton4 = new javax.swing.JButton();  
406.         jButton5 = new javax.swing.JButton();  
407.         jLabel1 = new javax.swing.JLabel();  
408.   
409.         setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);  
410.         setTitle("使用者");  
411.         setMaximumSize(new java.awt.Dimension(458, 580));  
412.         setMinimumSize(new java.awt.Dimension(458, 580));  
413.         setPreferredSize(new java.awt.Dimension(458, 580));  
414.         setResizable(false);  
415.         getContentPane().setLayout(null);  
416.   
417.         jTextField1.addActionListener(new java.awt.event.ActionListener() {  
418.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
419.                 jTextField1ActionPerformed(evt);  
420.             }  
421.         });  
422.         getContentPane().add(jTextField1);  
423.         jTextField1.setBounds(30, 60, 120, 30);  
424.   
425.         jTextArea1.setColumns(20);  
426.         jTextArea1.setRows(5);  
427.         jScrollPane1.setViewportView(jTextArea1);  
428.   
429.         getContentPane().add(jScrollPane1);  
430.         jScrollPane1.setBounds(10, 120, 440, 378);  
431.   
432.         jButton1.setText("登入");  
433.         jButton1.addActionListener(new java.awt.event.ActionListener() {  
434.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
435.                 jButton1ActionPerformed(evt);  
436.             }  
437.         });  
438.         getContentPane().add(jButton1);  
439.         jButton1.setBounds(180, 70, 130, 23);  
440.   
441.         jButton2.setText("匿名登入");  
442.         jButton2.addActionListener(new java.awt.event.ActionListener() {  
443.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
444.                 jButton2ActionPerformed(evt);  
445.             }  
446.         });  
447.         getContentPane().add(jButton2);  
448.         jButton2.setBounds(180, 30, 130, 23);  
449.   
450.         jLabel2.setFont(new java.awt.Font("微軟正黑體", 1, 14)); // NOI18N  
451.         jLabel2.setText("Name :");  
452.         getContentPane().add(jLabel2);  
453.         jLabel2.setBounds(60, 30, 60, 20);  
454.   
455.         jButton3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/phone-icon (1).png"))); // NOI18N  
456.         jButton3.addActionListener(new java.awt.event.ActionListener() {  
457.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
458.                 jButton3ActionPerformed(evt);  
459.             }  
460.         });  
461.         getContentPane().add(jButton3);  
462.         jButton3.setBounds(370, 500, 60, 50);  
463.         getContentPane().add(jTextField2);  
464.         jTextField2.setBounds(10, 511, 340, 30);  
465.   
466.         jButton4.setText("離線");  
467.         jButton4.addActionListener(new java.awt.event.ActionListener() {  
468.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
469.                 jButton4ActionPerformed(evt);  
470.             }  
471.         });  
472.         getContentPane().add(jButton4);  
473.         jButton4.setBounds(320, 70, 120, 23);  
474.   
475.         jButton5.setText("所有成員");  
476.         jButton5.addActionListener(new java.awt.event.ActionListener() {  
477.             public void actionPerformed(java.awt.event.ActionEvent evt) {  
478.                 jButton5ActionPerformed(evt);  
479.             }  
480.         });  
481.         getContentPane().add(jButton5);  
482.         jButton5.setBounds(320, 30, 120, 23);  
483.   
484.         jLabel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "使用者", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("微軟正黑體", 1, 14))); // NOI18N  
485.         getContentPane().add(jLabel1);  
486.         jLabel1.setBounds(10, 0, 440, 110);  
487.   
488.         pack();  
489.     }// </editor-fold>                          
490.   
491.     private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                              
492.         // TODO add your handling code here:  
493.     }                                             
494.   
495.     private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
496.        if(!isConnected){  
497.            try {  
498.                username = jTextField1.getText();  
499.                jTextField1.setEditable(false);//設定不可編輯  
500.                socket = new Socket( IP , port );  
501.                out  = new PrintWriter(socket.getOutputStream(),true);  
502.                in = new BufferedReader(new InputStreamReader(socket.getInputStream()));  
503.                out.println(username + ":"+"已加入聊天"+ ":連接");  
504.                isConnected = true ;  
505.            } catch (IOException ex) {  
506.                 JOptionPane.showMessageDialog(null , "沒連接到伺服器 再試一次.... \n");  
507.                 jTextField1.setEditable(false);  
508.            }  
509.             IncomingReader();  
510.        }else{  
511.           JOptionPane.showMessageDialog(null , "你已經登入了 \n");  
512.        }  
513.     }                                          
514.   
515.     private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
516.         if(!isConnected){  
517.            try {  
518.                int i = (int) (Math.random()*999)+11;      
519.                username = "Xin"+ i ;  
520.                jTextField1.setText(username);  
521.                jTextField1.setEditable(false);//設定不可編輯           
522.                socket = new Socket( IP , port );  
523.                out  = new PrintWriter(socket.getOutputStream(),true);  
524.                in = new BufferedReader(new InputStreamReader(socket.getInputStream()));  
525.                out.println(username + ":"+"已加入聊天"+ ":連接");  
526.                isConnected = true;  
527.                  
528.            } catch (IOException ex) {  
529.                 JOptionPane.showMessageDialog(null , "沒連接到伺服器 再試一次.... \n");  
530.                 jTextField1.setEditable(false);  
531.            }  
532.            IncomingReader();  
533.        }else{  
534.           JOptionPane.showMessageDialog(null , "你已經登入了 \n" , "訊息" , JOptionPane.QUESTION_MESSAGE);  
535.        }  
536.     }                                          
537.   
538.      public void sendExit() {  
539.         String bye = (username + ":已經離開聊天:離開");  
540.         try  
541.         {  
542.             out.println(bye);   
543.            // out.flush();   
544.         } catch (Exception e)   
545.         {  
546.              JOptionPane.showMessageDialog(null , "再試一次\n", "訊息" , JOptionPane.QUESTION_MESSAGE);  
547.         }  
548.     }  
549.        public void Disconnect(){  
550.         try   
551.         {  
552.             JOptionPane.showMessageDialog(null , "已經離開聊天");  
553.             socket.close();  
554.         } catch(Exception ex) {  
555.             JOptionPane.showMessageDialog(null ,"失敗訊息", "訊息" , JOptionPane.ERROR_MESSAGE );  
556.         }  
557.         isConnected = false;  
558.         jTextField1.setEditable(true);  
559.   
560.     }  
561.     private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                           
562.          sendExit();  
563.          Disconnect();  
564.     }                                          
565.   
566.     private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                           
567.         String mess = "";  
568.         if(jTextField2.getText().equals(mess)){  
569.            jTextField2.setText("");  
570.         }else{  
571.               try {  
572.                out.println(username + ":" + jTextField2.getText() + ":" + "聊天");  
573.                jTextField2.setText("");  
574.                 
575.             } catch (Exception ex) {  
576.                JOptionPane.showMessageDialog(null, "無法寄送....", "訊息" , JOptionPane.ERROR_MESSAGE);  
577.             }  
578.         }  
579.        jTextField2.requestFocus();  
580.     }                                          
581. ImageIcon member = new ImageIcon("MEMBER.png");  
582.     private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {                                           
583.        String Users = "";  
584.         for(String user : users )  
585.             Users+=user+"\n";  
586.        JOptionPane.showMessageDialog(null, Users, "在線成員", JOptionPane.QUESTION_MESSAGE , member);  
587.     }                                          
588.   
589.     /** 
590.      * @param args the command line arguments 
591.      */  
592.     public static void main(String args[]) {  
593.        /* Set the Nimbus look and feel */  
594.         //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">  
595.         /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
596.          * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html  
597.          */  
598.         try {  
599.             for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {  
600.                 if ("Nimbus".equals(info.getName())) {  
601.                     javax.swing.UIManager.setLookAndFeel(info.getClassName());  
602.                     break;  
603.                 }  
604.             }  
605.         } catch (ClassNotFoundException ex) {  
606.             java.util.logging.Logger.getLogger(Clinet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
607.         } catch (InstantiationException ex) {  
608.             java.util.logging.Logger.getLogger(Clinet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
609.         } catch (IllegalAccessException ex) {  
610.             java.util.logging.Logger.getLogger(Clinet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
611.         } catch (javax.swing.UnsupportedLookAndFeelException ex) {  
612.             java.util.logging.Logger.getLogger(Clinet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);  
613.         }  
614.         //</editor-fold>  
615.   
616.         /* Create and display the form */  
617.         java.awt.EventQueue.invokeLater(new Runnable() {  
618.             public void run() {  
619.                 new Clinet().setVisible(true);  
620.             }  
621.         });  
622.     }  
623.   
624.     // Variables declaration - do not modify                       
625.     private javax.swing.JButton jButton1;  
626.     private javax.swing.JButton jButton2;  
627.     private javax.swing.JButton jButton3;  
628.     private javax.swing.JButton jButton4;  
629.     private javax.swing.JButton jButton5;  
630.     private javax.swing.JLabel jLabel1;  
631.     private javax.swing.JLabel jLabel2;  
632.     private javax.swing.JScrollPane jScrollPane1;  
633.     private javax.swing.JTextArea jTextArea1;  
634.     private javax.swing.JTextField jTextField1;  
635.     private javax.swing.JTextField jTextField2;  
636.     // End of variables declaration                     
637. }