首先创建一个Java project，在其中创建如下类：
在GameWindow中写入代码如下：
1 package game; 2 3 import java.awt.BorderLayout; 4 import java.awt.Color; 5 import java.awt.FlowLayout; 6 import java.awt.Font; 7 import java.awt.GridBagConstraints; 8 import java.awt.GridBagLayout; 9 import java.awt.event.ActionEvent; 10 import java.awt.event.ActionListener; 11 import java.util.Random; 12 13 import javax.swing.*; 14 15 public class GameWindow extends JFrame implements ActionListener {// 窗口充当监听器 { 16 JButton a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z; 17 JLabel lblword, lblmessage; 18 JPanel keypad, key1, key2, key3, screen, notify; 19 int len, count, chance, flag, rnd; 20 Random rd; 21 String word[] = { "JAPAN", "QATAR", "SYRIA", "MONGOLIA", "BAHARAIN", "INDIA", "PAKISTAN", "AUSTRALIA", "AFGHNISTAN", 22 "CHINA" }; 23 24 StringBuffer blanks; 25 26 public GameWindow() { 27 a = new JButton("A"); 28 b = new JButton("B"); 29 c = new JButton("C"); 30 d = new JButton("D"); 31 e = new JButton("E"); 32 f = new JButton("F"); 33 g = new JButton("G"); 34 h = new JButton("H"); 35 i = new JButton("I"); 36 j = new JButton("J"); 37 k = new JButton("K"); 38 l = new JButton("L"); 39 m = new JButton("M"); 40 n = new JButton("N"); 41 o = new JButton("O"); 42 p = new JButton("P"); 43 q = new JButton("Q"); 44 r = new JButton("R"); 45 s = new JButton("S"); 46 t = new JButton("T"); 47 u = new JButton("U"); 48 v = new JButton("V"); 49 w = new JButton("W"); 50 x = new JButton("X"); 51 y = new JButton("Y"); 52 z = new JButton("Z"); 53 54 lblmessage = new JLabel("Guess a Country Name"); 55 lblmessage.setFont(new Font("Serif", Font.PLAIN, 20)); 56 57 lblword = new JLabel(); 58 lblword.setFont(new Font("Serif", Font.PLAIN, 35)); 59 60 notify = new JPanel(); 61 notify.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0))); 62 63 screen = new JPanel(); 64 screen.setBackground(Color.WHITE); 65 screen.setSize(0, 200); 66 67 keypad = new JPanel(); 68 keypad.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0))); 69 keypad.setBackground(Color.black); 70 71 key1 = new JPanel(); 72 key1.setBackground(Color.blue); 73 74 key2 = new JPanel(); 75 key2.setBackground(Color.GREEN); 76 77 key3 = new JPanel(); 78 key3.setBackground(Color.RED); 79 80 // 变量初始化 81 count = 0; 82 chance = 0; 83 rd = new Random(); 84 blanks = new StringBuffer(); 85 86 setTitle("Hangman Game"); 87 setSize(500, 450); 88 setVisible(true); 89 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 90 91 // Add Listener 92 a.addActionListener(this); 93 b.addActionListener(this); 94 c.addActionListener(this); 95 d.addActionListener(this); 96 e.addActionListener(this); 97 98 f.addActionListener(this); 99 g.addActionListener(this); 100 h.addActionListener(this); 101 i.addActionListener(this); 102 j.addActionListener(this); 103 104 k.addActionListener(this); 105 l.addActionListener(this); 106 m.addActionListener(this); 107 n.addActionListener(this); 108 o.addActionListener(this); 109 110 p.addActionListener(this); 111 q.addActionListener(this); 112 r.addActionListener(this); 113 s.addActionListener(this); 114 t.addActionListener(this); 115 116 u.addActionListener(this); 117 v.addActionListener(this); 118 w.addActionListener(this); 119 x.addActionListener(this); 120 y.addActionListener(this); 121 122 z.addActionListener(this); 123 } 124 125 public void addComponent() { 126 GridBagConstraints gc = new GridBagConstraints(); 127 128 notify.setLayout(new FlowLayout()); 129 notify.add(lblmessage); 130 131 screen.setLayout(new GridBagLayout()); 132 screen.add(lblword, gc); 133 134 keypad.setLayout(new GridBagLayout()); 135 136 key1.setLayout(new FlowLayout()); 137 key1.add(q); 138 key1.add(w); 139 key1.add(e); 140 key1.add(r); 141 key1.add(t); 142 key1.add(y); 143 key1.add(u); 144 key1.add(i); 145 key1.add(o); 146 key1.add(p); 147 148 gc.gridx = 0; 149 gc.gridy = 0; 150 keypad.add(key1, gc); 151 152 key2.setLayout(new FlowLayout()); 153 key2.add(a); 154 key2.add(s); 155 key2.add(d); 156 key2.add(f); 157 key2.add(g); 158 key2.add(h); 159 key2.add(j); 160 key2.add(k); 161 key2.add(l); 162 163 gc.gridx = 0; 164 gc.gridy = 1; 165 keypad.add(key2, gc); 166 167 key3.setLayout(new FlowLayout()); 168 key3.add(z); 169 key3.add(x); 170 key3.add(c); 171 key3.add(v); 172 key3.add(b); 173 key3.add(n); 174 key3.add(m); 175 176 gc.gridx = 0; 177 gc.gridy = 2; 178 keypad.add(key3, gc); 179 180 setLayout(new BorderLayout()); 181 add(notify, BorderLayout.NORTH); 182 add(screen, BorderLayout.CENTER); 183 add(keypad, BorderLayout.SOUTH); 184 185 } 186 187 @Override 188 public void actionPerformed(ActionEvent ae) { 189 JButton jb = (JButton) ae.getSource(); 190 String letter = ae.getActionCommand(); 191 192 flag = 0; 193 for (int loop = 0; loop < len; loop++) { 194 if (letter.charAt(0) == word[rnd].charAt(loop)) { 195 flag = 1; 196 blanks.replace((loop * 3), ((loop * 3) + 1), letter); 197 count++; 198 199 } 200 } 201 if (flag == 1) { 202 lblword.setText(blanks.toString()); 203 jb.setBackground(Color.GREEN); 204 jb.setEnabled(false); 205 206 } else { 207 jb.setBackground(Color.RED); 208 jb.setEnabled(false); 209 chance++; 210 211 } 212 if (count == len) { 213 JOptionPane.showMessageDialog(this, "Congrats You Guessed the Word correctly"); 214 int n = JOptionPane.showConfirmDialog(this, "Do you want to play again ?", "Restart Game", 215 JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE); 216 217 if (n == JOptionPane.YES_NO_OPTION) { 218 GameWindow obj = new GameWindow(); 219 obj.stratGame(); 220 this.dispose(); 221 222 } else { 223 this.dispose(); 224 Menu obj = new Menu(); 225 obj.addComponent(); 226 } 227 228 } 229 if (chance > 5) { 230 JOptionPane.showMessageDialog(this, "Sorry you lost your chances"); 231 int n = JOptionPane.showConfirmDialog(this, "Do you want to play again", "Restart Game", 232 JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE); 233 234 if (n == JOptionPane.YES_OPTION) { 235 GameWindow obj = new GameWindow(); 236 obj.stratGame(); 237 this.dispose(); 238 239 } else { 240 this.dispose(); 241 Menu obj = new Menu(); 242 obj.addComponent(); 243 } 244 } 245 } 246 247 public void stratGame() { 248 addComponent(); 249 rnd = rd.nextInt(10); 250 len = word[rnd].length(); 251 252 for (int j = 0; j < len; j++) { 253 blanks.append("_ "); 254 255 } 256 lblword.setText(blanks.toString()); 257 } 258 }
在Hangman中写入代码如下：
1 package game; 2 3 public class Hangman { 4 public static void main(String args[]) { 5 Menu mobj = new Menu(); 6 mobj.addComponent(); 7 8 /* 9 * GameWindow gobj=new GameWindow(); gobj.addComponent(); 10 */ 11 // validate; 12 } 13 } 14 15 /* 16 * package game; 17 * 18 * import java.util.Random; 19 * 20 * import java.util.Scanner; 21 * 22 * public class Hangman { String word[] = { "japan", "qatar", "syria", 23 * "mongolia", "bathrain", "india" }; 24 * 25 * public void showMenu() { 26 * System.out.println("--------------Menu------------"); 27 * System.out.println("1.play Game"); System.out.println("2.Instructions"); 28 * System.out.println("3.Exit"); System.out.println(); 29 * System.out.println(" Please input your choose:"); Scanner reader = new 30 * Scanner(System.in); int option = 0; try { option = reader.nextInt(); } catch 31 * (RuntimeException e) { 32 * System.out.println("Please provide a valid numeric input"); showMenu(); } // 33 * switch构造（接受用户选择） switch (option) { case 1: playGame(); break; case 2: 34 * instructionGame(); break; case 3: exitGrame(); break; // 不是1，2，3的时候抛出异常 35 * default: try { throw new MenuInputException(); } catch (Exception e) { 36 * showMenu(); } System.out.println("The input is wrong !"); } } 37 * 38 * private void exitGrame() { // TODO Auto-generated method stub 39 * System.out.println("Exit Grame is waking up !"); 40 * 41 * } 42 * 43 * private void instructionGame() { // TODO Auto-generated method stub 44 * System.out.println("Instruction Game is waking up!"); 45 * 46 * } 47 * 48 * private void playGame() { // String 49 * word[]={"japan","qatar","syria","mongolia","bathrain","india"}; int len, i, 50 * count = 0, rnd, flag = 0; String choice, temp; Random rd = new Random(); 51 * Scanner input = new Scanner(System.in); rnd = rd.nextInt(6); len = 52 * word[rnd].length(); 53 * System.out.println("The length of the first word you guess is :" + len); 54 * char[] newString = new char[len]; StringBuffer wrgString = new 55 * StringBuffer(); for (int j = 0; j < len; j++) { System.out.print("_ "); } 56 * System.out.println(); do { flag = 0; 57 * System.out.print(" Enter your guess:"); String ch; try { ch = 58 * input.nextLine().toLowerCase(); if (ch.length() != 1) { throw new 59 * WrongInputException(); } count++; for (i = 0; i < len; i++) { // 60 * System.out.println( " answer"+ch.charAt(0)); if (word[rnd].charAt(i) == 61 * ch.charAt(0)) { System.out.println("yeah,right ；" + ch.charAt(0)); 62 * newString[i] = word[rnd].charAt(i); flag = 1; } } if (flag == 0) { flag = 1; 63 * wrgString.append(ch + " ,"); System.out.println(" Misses:" + wrgString + 64 * " Go on! "); System.out.println(); } System.out.println(newString); temp = 65 * new String(newString); System.out.print(temp); if (word[rnd].equals(temp)) { 66 * System.out.println("---------Congrats :)You won -----------"); 67 * System.out.println("Do you want to play again(Y/N)"); choice = 68 * input.nextLine(); if (choice.equalsIgnoreCase("y")) { playGame(); } else { 69 * showMenu(); } } } catch (WrongInputException e) { flag = 1; } } while (flag 70 * != 0); } 71 * 72 * public static void main(String[] args) { Hangman gh = new Hangman(); 73 * gh.showMenu(); } } 74 */
在Menu中写入代码如下：
1 package game; 2 3 import java.awt.Font; 4 import java.awt.GridBagConstraints; 5 import java.awt.GridBagLayout; 6 import java.awt.event.ActionEvent; 7 import java.awt.event.ActionListener; 8 9 import javax.swing.JButton; 10 import javax.swing.JFrame; 11 import javax.swing.JLabel; 12 import javax.swing.JOptionPane; 13 14 public class Menu extends JFrame implements ActionListener { 15 JButton option1; 16 JButton option2; 17 JButton option3; 18 JLabel name; 19 20 public Menu() { 21 option1 = new JButton("Play Game"); 22 option2 = new JButton("View Instructions"); 23 option3 = new JButton("Exit"); 24 name = new JLabel("HANGAME"); 25 name.setFont(new Font("Serif", Font.PLAIN, 24)); 26 27 setTitle("Hangman Game"); 28 setSize(300, 200); 29 setResizable(false); 30 setVisible(true); 31 32 // 注册监听器 33 option1.addActionListener(this); 34 option2.addActionListener(this); 35 option3.addActionListener(this); 36 37 } 38 39 public void addComponent() { 40 setLayout(new GridBagLayout()); 41 GridBagConstraints c = new GridBagConstraints(); 42 43 c.gridx = 0; 44 c.gridy = 0; 45 c.weighty = 0.1; 46 c.anchor = c.CENTER; 47 add(name, c); 48 49 c.gridx = 0; 50 c.gridy = 1; 51 c.fill = c.HORIZONTAL; 52 add(option1, c); 53 54 c.gridx = 0; 55 c.gridy = 2; 56 c.fill = c.HORIZONTAL; 57 add(option2, c); 58 59 c.gridx = 0; 60 c.gridy = 3; 61 c.fill = c.HORIZONTAL; 62 add(option3, c); 63 } 64 65 @Override 66 public void actionPerformed(ActionEvent e) { 67 // TODO Auto-generated method stub 68 if (e.getSource() == option1) { 69 GameWindow obj = new GameWindow(); 70 obj.stratGame(); 71 } else if (e.getSource() == option2) { 72 JOptionPane.showMessageDialog(this, "1.You can" 73 + " guess the word by clicking the character from the virtual keypad. " 74 + "2.You can select a maximum color, and the correct one will be highlighted with green color.", 75 "Instructions ", JOptionPane.INFORMATION_MESSAGE); 76 ; 77 } else if (e.getSource() == option3) { 78 System.exit(0); 79 80 } 81 } 82 }
另外，添加了2个异常的处理：
在MenuInputException中写入代码如下：
1 package game; 2 3 public class MenuInputException extends RuntimeException { 4 MenuInputException() { 5 System.out.println("Please provide a valid input(1-3)"); 6 } 7 }
分析：该段代码为在命令行界面运行时，出现选择超过3 ，则报出异常，但是在命令行界面不会出现。
在WrongInputException中写入代码如下：
1 package game; 2 3 public class WrongInputException extends RuntimeException { 4 WrongInputException(){ 5 System.out.println("Please provide a single character only..!!"); 6 } 7 }
分析：该段代码也是在命令行运行时可能出现单次输入的字母不为一个，则报出异常。同样ui界面不会出现。
运行结果如下：
出现如下窗口：窗口中有三个选项：play Game,View Introduction,Exit
点击Play Game 出现下图，表示开始玩游戏
点击View Intorduction界面弹出消息对话框，提示游戏规则：
点击Exit,就直接退出。