├── PuzzleEx.java
├── README.md
├── icesid.jpg
└── puzzle.png


/PuzzleEx.java:
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  1 | package com.zetcode;
  2 | 
  3 | import javax.imageio.ImageIO;
  4 | import javax.swing.AbstractAction;
  5 | import javax.swing.BorderFactory;
  6 | import javax.swing.ImageIcon;
  7 | import javax.swing.JButton;
  8 | import javax.swing.JComponent;
  9 | import javax.swing.JFrame;
 10 | import javax.swing.JOptionPane;
 11 | import javax.swing.JPanel;
 12 | import java.awt.BorderLayout;
 13 | import java.awt.Color;
 14 | import java.awt.EventQueue;
 15 | import java.awt.GridLayout;
 16 | import java.awt.Image;
 17 | import java.awt.Point;
 18 | import java.awt.event.ActionEvent;
 19 | import java.awt.event.MouseAdapter;
 20 | import java.awt.event.MouseEvent;
 21 | import java.awt.image.BufferedImage;
 22 | import java.awt.image.CropImageFilter;
 23 | import java.awt.image.FilteredImageSource;
 24 | import java.io.File;
 25 | import java.io.IOException;
 26 | import java.util.ArrayList;
 27 | import java.util.Collections;
 28 | import java.util.List;
 29 | 
 30 | class MyButton extends JButton {
 31 | 
 32 |     private boolean isLastButton;
 33 | 
 34 |     public MyButton() {
 35 | 
 36 |         super();
 37 | 
 38 |         initUI();
 39 |     }
 40 | 
 41 |     public MyButton(Image image) {
 42 | 
 43 |         super(new ImageIcon(image));
 44 | 
 45 |         initUI();
 46 |     }
 47 | 
 48 |     private void initUI() {
 49 | 
 50 |         isLastButton = false;
 51 |         BorderFactory.createLineBorder(Color.gray);
 52 | 
 53 |         addMouseListener(new MouseAdapter() {
 54 | 
 55 |             @Override
 56 |             public void mouseEntered(MouseEvent e) {
 57 |                 setBorder(BorderFactory.createLineBorder(Color.yellow));
 58 |             }
 59 | 
 60 |             @Override
 61 |             public void mouseExited(MouseEvent e) {
 62 |                 setBorder(BorderFactory.createLineBorder(Color.gray));
 63 |             }
 64 |         });
 65 |     }
 66 | 
 67 |     public void setLastButton() {
 68 | 
 69 |         isLastButton = true;
 70 |     }
 71 | 
 72 |     public boolean isLastButton() {
 73 | 
 74 |         return isLastButton;
 75 |     }
 76 | }
 77 | 
 78 | public class PuzzleEx extends JFrame {
 79 | 
 80 |     private JPanel panel;
 81 |     private BufferedImage source;
 82 |     private BufferedImage resized;
 83 |     private Image image;
 84 |     private MyButton lastButton;
 85 |     private int width, height;
 86 | 
 87 |     private List<MyButton> buttons;
 88 |     private List<Point> solution;
 89 | 
 90 |     private final int NUMBER_OF_BUTTONS = 12;
 91 |     private final int DESIRED_WIDTH = 300;
 92 | 
 93 | 
 94 |     public PuzzleEx() {
 95 | 
 96 |         initUI();
 97 |     }
 98 | 
 99 |     private void initUI() {
100 | 
101 |         solution = new ArrayList<>();
102 | 
103 |         solution.add(new Point(0, 0));
104 |         solution.add(new Point(0, 1));
105 |         solution.add(new Point(0, 2));
106 |         solution.add(new Point(1, 0));
107 |         solution.add(new Point(1, 1));
108 |         solution.add(new Point(1, 2));
109 |         solution.add(new Point(2, 0));
110 |         solution.add(new Point(2, 1));
111 |         solution.add(new Point(2, 2));
112 |         solution.add(new Point(3, 0));
113 |         solution.add(new Point(3, 1));
114 |         solution.add(new Point(3, 2));
115 | 
116 |         buttons = new ArrayList<>();
117 | 
118 |         panel = new JPanel();
119 |         panel.setBorder(BorderFactory.createLineBorder(Color.gray));
120 |         panel.setLayout(new GridLayout(4, 3, 0, 0));
121 | 
122 |         try {
123 |             source = loadImage();
124 |             int h = getNewHeight(source.getWidth(), source.getHeight());
125 |             resized = resizeImage(source, DESIRED_WIDTH, h,
126 |                     BufferedImage.TYPE_INT_ARGB);
127 | 
128 |         } catch (IOException ex) {
129 |             JOptionPane.showMessageDialog(this, "Could not load image", "Error",
130 |                     JOptionPane.ERROR_MESSAGE);
131 |         }
132 | 
133 |         width = resized.getWidth(null);
134 |         height = resized.getHeight(null);
135 | 
136 |         add(panel, BorderLayout.CENTER);
137 | 
138 |         for (int i = 0; i < 4; i++) {
139 | 
140 |             for (int j = 0; j < 3; j++) {
141 | 
142 |                 image = createImage(new FilteredImageSource(resized.getSource(),
143 |                         new CropImageFilter(j * width / 3, i * height / 4,
144 |                                 (width / 3), height / 4)));
145 | 
146 |                 var button = new MyButton(image);
147 |                 button.putClientProperty("position", new Point(i, j));
148 | 
149 |                 if (i == 3 && j == 2) {
150 | 
151 |                     lastButton = new MyButton();
152 |                     lastButton.setBorderPainted(false);
153 |                     lastButton.setContentAreaFilled(false);
154 |                     lastButton.setLastButton();
155 |                     lastButton.putClientProperty("position", new Point(i, j));
156 |                 } else {
157 | 
158 |                     buttons.add(button);
159 |                 }
160 |             }
161 |         }
162 | 
163 |         Collections.shuffle(buttons);
164 |         buttons.add(lastButton);
165 | 
166 |         for (int i = 0; i < NUMBER_OF_BUTTONS; i++) {
167 | 
168 |             var btn = buttons.get(i);
169 |             panel.add(btn);
170 |             btn.setBorder(BorderFactory.createLineBorder(Color.gray));
171 |             btn.addActionListener(new ClickAction());
172 |         }
173 | 
174 |         pack();
175 | 
176 |         setTitle("Puzzle");
177 |         setResizable(false);
178 |         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
179 |         setLocationRelativeTo(null);
180 |     }
181 | 
182 |     private int getNewHeight(int w, int h) {
183 | 
184 |         double ratio = DESIRED_WIDTH / (double) w;
185 |         int newHeight = (int) (h * ratio);
186 |         return newHeight;
187 |     }
188 | 
189 |     private BufferedImage loadImage() throws IOException {
190 | 
191 |         var bimg = ImageIO.read(new File("src/resources/icesid.jpg"));
192 | 
193 |         return bimg;
194 |     }
195 | 
196 |     private BufferedImage resizeImage(BufferedImage originalImage, int width,
197 |                                       int height, int type) {
198 | 
199 |         var resizedImage = new BufferedImage(width, height, type);
200 |         var g = resizedImage.createGraphics();
201 |         g.drawImage(originalImage, 0, 0, width, height, null);
202 |         g.dispose();
203 | 
204 |         return resizedImage;
205 |     }
206 | 
207 |     private class ClickAction extends AbstractAction {
208 | 
209 |         @Override
210 |         public void actionPerformed(ActionEvent e) {
211 | 
212 |             checkButton(e);
213 |             checkSolution();
214 |         }
215 | 
216 |         private void checkButton(ActionEvent e) {
217 | 
218 |             int lidx = 0;
219 | 
220 |             for (MyButton button : buttons) {
221 |                 if (button.isLastButton()) {
222 |                     lidx = buttons.indexOf(button);
223 |                 }
224 |             }
225 | 
226 |             var button = (JButton) e.getSource();
227 |             int bidx = buttons.indexOf(button);
228 | 
229 |             if ((bidx - 1 == lidx) || (bidx + 1 == lidx)
230 |                     || (bidx - 3 == lidx) || (bidx + 3 == lidx)) {
231 |                 Collections.swap(buttons, bidx, lidx);
232 |                 updateButtons();
233 |             }
234 |         }
235 | 
236 |         private void updateButtons() {
237 | 
238 |             panel.removeAll();
239 | 
240 |             for (JComponent btn : buttons) {
241 | 
242 |                 panel.add(btn);
243 |             }
244 | 
245 |             panel.validate();
246 |         }
247 |     }
248 | 
249 |     private void checkSolution() {
250 | 
251 |         var current = new ArrayList<Point>();
252 | 
253 |         for (JComponent btn : buttons) {
254 |             current.add((Point) btn.getClientProperty("position"));
255 |         }
256 | 
257 |         if (compareList(solution, current)) {
258 |             JOptionPane.showMessageDialog(panel, "Finished",
259 |                     "Congratulation", JOptionPane.INFORMATION_MESSAGE);
260 |         }
261 |     }
262 | 
263 |     public static boolean compareList(List ls1, List ls2) {
264 | 
265 |         return ls1.toString().contentEquals(ls2.toString());
266 |     }
267 | 
268 |     public static void main(String[] args) {
269 | 
270 |         EventQueue.invokeLater(() -> {
271 | 
272 |             var puzzle = new PuzzleEx();
273 |             puzzle.setVisible(true);
274 |         });
275 |     }
276 | }
277 | 


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/README.md:
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1 | # Puzzle-game-in-Java-Swing
2 | Sources from the ZetCode's Puzzle game in Java Swing
3 | 
4 | http://zetcode.com/javagames/puzzle/
5 | 
6 | ![Puzzle game screenshot](puzzle.png)
7 | 
8 | Available under 2-Clause BSD License https://opensource.org/licenses/BSD-2-Clause
9 | 


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/icesid.jpg:
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https://raw.githubusercontent.com/janbodnar/Puzzle-game-in-Java-Swing/84ac2fa77a6007f6859f017ee68f3e1c7270ffae/icesid.jpg


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/puzzle.png:
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https://raw.githubusercontent.com/janbodnar/Puzzle-game-in-Java-Swing/84ac2fa77a6007f6859f017ee68f3e1c7270ffae/puzzle.png


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