"ืคืืคืฆื" ืึธืืขืจ "ืคืืคืฆื" ืืื ืึท ืืืกืืขืฆืืืื ื ืืืึทืฉืคึผืื ืคืื ืึท ืคึผืฉืื ืืึธืืืง ืฉืคึผืื ืืืึธืก ืืื ืคืึธืืงืก ืืืืขืจ ืื ืืืขืื. ืืื ืกืืจ ืฆื ืกืึธืืืืข ืื ืจืขืืขื ืืฉ, ืืืจ ืืึทืจืคึฟื ืฆื ืฆืืืืืื ืื ืกืงืืืขืจื ืืื ื ืืืขืจื ืืื ืกืืจ, ืคืื ืงืืขื ืกืืขืจ ืฆื ืืจืขืกืื. ืขืก ืืื ื ืืฉื ืืจืื ื, ืึธืืขืจ ืขืก ืืื ืืฉืืงืึทืืืข.
ืืื ืืืึทื ื ืก ืืืืึธืจืืึทื ืืืจ ืืืขื ืืืืึทืื ืืืจ ืืื ืฆื ืึทื ืืืืืงืืขื Fifteen ืืื Java 8 ืืื Eclipse. ืฆื ืึทื ืืืืืงืืขื ืื ืื ืืืจ ืืืขืื ื ืืฆื ืื Swing API.
ืืืจ ืืขืจืืึธื ืขื ืืืจ: ืคึฟืึทืจ ืึทืืข ืืืืขื ืขืจ ืคืื "ืืืจ" - ืึท ืึทืจืึธืคึผืจืขืืขื ืขื ืคืื 10 ืจืืื ืืืขื ืืืจ ืคืึทืจืฉืจืืึทืื ืืื ืงืืื ืกืงืืืืึธืงืก ืงืืจืก ื ืืฆื ืื ืคึผืขืจืืึธืืฉืึทื ืึทื ืงืึธื "ืืืจ".
Skillbox ืจืขืงืึทืืขื ืื: ืืืืืื ืืงืจืืื ืึธื ืืืื ืงืืจืก .
ืฉืคึผืื ืคึผืืึทื
ืืื ืืขื ืืื ืข ืืืจ ืืึทืจืคึฟื ืฆื ืืขืคืื ืืจื ืื ืคึผืจืึธืคึผืขืจืืืขืก:
- ืืจืืืก - ืื ืืจืืืก ืคืื ืืขื ืฉืคึผืื ืคืขืื;
- nbTiles - ื ืืืขืจ ืคืื ืืึทืืก ืืื ืืขื ืคืขืื. ื ืืืืืขืก = ืืจืืืก * ืืจืืืก - 1;
- ืืืืขืก ืืื ืึท ืงืืืืื ืืืึธืก ืืื ืึท ืืืื-ืืืืขื ืฉืึทื ืึทื ืืขื ืืข ืคืื โโโโืื ืืึทืืืฉืขืจื. ืืขืืขืจ ืคืื ืื ืืึทืืก ืืืขื ืืึทืงืืืขื ืึท ืืื ืฆืืง ืืืขืจื ืืื ืื ืงืืื [0, nbTiles]. ื ืื ืื ืืืงืืืฅ ืึท ืืืืืืง ืงืืืึทืืจืึทื;
- blankPos - ืฉืืขืืข ืคืื โโโโืื ืืืืืืง ืงืืืึทืืจืึทื.
ืฉืคึผืื ืืึธืืืง
ืืืจ ืืึทืจืคึฟื ืฆื ืืขืคืื ืืจื ืึท ืืึทืฉืืขืืืง ืืืคึฟื ืืขื ืืฆื ืฆื ืื ืืฉืึทืืืื ืึท ื ืืึทืข ืฉืคึผืื ืฉืืขืืข. ืืขื ืืืขื ืืืจ ืฉืืขืื ืึท ืืืขืจื ืคึฟืึทืจ ืืขืืขืจ ืขืืขืืขื ื ืคืื ืื ืืึทืืก ืืขื ืืข. ื ื, ืืืจ ืฉืืขืื ืืืึทื ืงืคึผืึธืก ืืื ืื ืืขืฆืืข ืฉืืขืืข ืคืื โโืื ืืขื ืืข.
ืืืจ ืืืื ืืึทืจืคึฟื ืึท ืฉืึทืจื ืืืคึฟื ืฆื ืฉืึทืจื ืื ืืขื ืืข ืคืื โโืืึทืืก. ืืืจ ืืึธื ื ืื ืึทืจืืึทื ื ืขืืขื ืื ืืืืืืง ืงืืืืื ืืื ืื ืฉืึทืคืืื ื ืคึผืจืึธืฆืขืก ืฆื ืืึธืื ืขืก ืืื ืืขืจ ืืขืืืืงืขืจ ืฉืืขืืข.
ืืื ื ืืืืื ืืึทืื ืคืื ืื ืืขืืืขื ืกืืึทืจืืื ื ืฉืืขืืขืก ืคืื ืื ืจืขืืขื ืืฉ ืืึธืื ืึท ืืืืืื ื, ืืืจ ืืึทืจืคึฟื ืฆื ืงืึธื ืืจืึธืืืจื ืื ืจืืืึทืืืื ื ืฉืึทืจื ืจืขืืืืืึทื ืฆื ืืึทืื ืืืืขืจ ืึทื ืื ืงืจืึทื ื ืืืืกืืืื ืืื ืืคืืื ืกืึธืืืืึทืืึทื. ืฆื ืืึธื ืืึธืก, ืืืจ ืืขืคืื ืืจื ืื isSolvable ืืืคึฟื.
ืืืื ืึท ืืึทืืื ืืขืจ ืงืืืืื ืืื ืคึผืจืืกืืืึทื ืืืจื ืึท ืงืืืืื ืืื ืึท ืืขืืขืจ ืืืขืจื, ืขืก ืืื ืืขืืืืื ืึท ืื ืืืขืจืืฉืึทื. ืืืขื ืื ืืืืืืง ืึธืจื ืืื ืืื ืคึผืืึทืฅ, ืื ื ืืืขืจ ืคืื ืื ืืืขืจืืฉืึทื ื ืืืื ืืืื ืืคืืื ืคึฟืึทืจ ืื ืจืขืืขื ืืฉ ืฆื ืืืื ืกืึธืืืืึทืืึทื. ืึทืืื ืืืจ ืฆืืืื ืื ื ืืืขืจ ืคืื ืื ืืืขืจืืฉืึทื ื ืืื ืฆืืจืืงืงืืืขื ืืืช ืืืื ืื ื ืืืขืจ ืืื ืืคืืื.
ืืขืจื ืึธื, ืขืก ืืื ืืืืืืืง ืฆื ืืขืคืื ืืจื ืื isSolved ืืืคึฟื ืฆื ืงืึธื ืืจืึธืืืจื ืืืื ืืื ืืืขืจ Game Of Fifteen ืืืืกืืืื ืืื ืกืึทืืืื. ืขืจืฉืืขืจ ืืืจ ืงืืงื ืืื ืืื ืื ืืืืืืง ืึธืจื ืืื. ืืืื ืืื ืืขืจ ืขืจืฉื ืฉืืขืืข, ืื ืงืจืึทื ื ืึทืืืื ืืึทื ื ืืื ื ืืึท, ื ืืฉื ืืื ืึทืืขืจ ืืึทืฉืืึธืกื. ืืืจ ืืขืืึธืื ืืืขืจืืื ืืืจื ืื ืืืืื ืืื ืคืึทืจืงืขืจื ืกืืจ, ืืื ืืืื ืื ืืืขืจื ืคืื ืื ืงืืืืื ืืื ืึทื ืืขืจืฉ ืคืื ืื ืงืึธืจืึทืกืคึผืึทื ืืื ื ืืื ืืขืงืก +1, ืืืจ ืฆืืจืืงืงืืืขื ืคืึทืืฉ. ืึทื ืืขืจืฉ, ืืื ืื ืกืืฃ ืคืื ืืขื ืืืคึฟื ืขืก ืืื ืฆืืื ืฆื ืฆืืจืืงืงืืืขื ืืืช ืืืืึทื ืื ืจืขืืขื ืืฉ ืืื ืฉืืื ืกืึทืืืื.
ืื ืื ืืขืจ ืืืคึฟื ืืืึธืก ืืึทืจืฃ ืืืื ืืืคืืื ื ืืื newGame. ืขืก ืืื ืคืืจืืื ืื ืฆื ืฉืึทืคึฟื ืึท ื ืืึทืข ืืืึทืฉืคึผืื ืคืื ืื ืฉืคึผืื. ืฆื ืืึธื ืืึธืก, ืืืจ ืืึทืฉืืขืืืง ืื ืคึผืืืืื ื ืคืขืื, ืืึทื ืฉืึทืจื ืขืก ืืื ืคืึธืจืืขืฆื ืืื ืื ืคึผืืืืื ื ืฉืืขืืข ืืื ืจืืืึทืืืื.
ืืึธ ืืื ืึท ืืืึทืฉืคึผืื ืงืึธื ืืื ืื ืฉืืืกื ืืึธืืืง ืคืื ืงืืืืื:
private void newGame() {
do {
reset(); // reset in initial state
shuffle(); // shuffle
} while(!isSolvable()); // make it until grid be solvable
gameOver = false;
}
private void reset() {
for (int i = 0; i < tiles.length; i++) {
tiles[i] = (i + 1) % tiles.length;
}
// we set blank cell at the last
blankPos = tiles.length - 1;
}
private void shuffle() {
// don't include the blank tile in the shuffle, leave in the solved position
int n = nbTiles;
while (n > 1) {
int r = RANDOM.nextInt(n--);
int tmp = tiles[r];
tiles[r] = tiles[n];
tiles[n] = tmp;
}
}
// Only half permutations of the puzzle are solvable/
// Whenever a tile is preceded by a tile with higher value it counts
// as an inversion. In our case, with the blank tile in the solved position,
// the number of inversions must be even for the puzzle to be solvable
private boolean isSolvable() {
int countInversions = 0;
for (int i = 0; i < nbTiles; i++) {
for (int j = 0; j < i; j++) {
if (tiles[j] > tiles[i])
countInversions++;
}
}
return countInversions % 2 == 0;
}
private boolean isSolved() {
if (tiles[tiles.length - 1] != 0) // if blank tile is not in the solved position ==> not solved
return false;
for (int i = nbTiles - 1; i >= 0; i--) {
if (tiles[i] != i + 1)
return false;
}
return true;
}ืฆืื ืกืืฃ, ืืืจ ืืึทืจืคึฟื ืฆื ืคึผืจืึธืืจืึทื ืื ืืึทืืืขืืื ื ืคืื ืื ืืึทืืก ืืื ืื ืืขื ืืข. ืืขืจ ืงืึธื ืืืขื ืืืื ืืขืจืืคึฟื ืฉืคึผืขืืขืจ ืืืจื ืึท ืงืึทืืืืึทืง ืฆื ืจืืกืคึผืึทื ื ืฆื ืืืืคึฟืขืจ ืืึทืืืขืืื ื. ืืื ืืืขืจ ืฉืคึผืื ืืืขื ืฉืืืฆื ืงืืืคื ืงืึทืื ืืืืืืึทื ืฅ ืืื ืืขืจ ืืขืืืืงืขืจ ืฆืืื. ืืืื, ื ืึธื ืืืจ ืืึธืื ืงืึธื ืืืขืจืืขื ืื ืืขืืจืืงื ืฉืืขืืข ืืืืฃ ืืขื ืขืงืจืึทื ืืื ืึท ืงืืืืื, ืืืจ ืืึทืงืืืขื ืื ืฉืืขืืข ืคืื โโโโืื ืืืืืืง ืงืืืืื ืืื ืงืืงื ืคึฟืึทืจ ืึท ืจืืืืื ื ืคืื ืืึทืืืขืืื ื ืฆื ืฉืืืฆื ืขืืืขืืข ืคืื โโืืืึทื ืืืืืืึทื ืฅ ืืื ืืขืจ ืืขืืืืงืขืจ ืฆืืื.
ืืึธ ืก ืึท ืงืึธื ืืืึทืฉืคึผืื:
// get position of the click
int ex = e.getX() - margin;
int ey = e.getY() - margin;
// click in the grid ?
if (ex < 0 || ex > gridSize || ey < 0 || ey > gridSize)
return;
// get position in the grid
int c1 = ex / tileSize;
int r1 = ey / tileSize;
// get position of the blank cell
int c2 = blankPos % size;
int r2 = blankPos / size;
// we convert in the 1D coord
int clickPos = r1 * size + c1;
int dir = 0;
// we search direction for multiple tile moves at once
if (c1 == c2 && Math.abs(r1 - r2) > 0)
dir = (r1 - r2) > 0 ? size : -size;
else if (r1 == r2 && Math.abs(c1 - c2) > 0)
dir = (c1 - c2) > 0 ? 1 : -1;
if (dir != 0) {
// we move tiles in the direction
do {
int newBlankPos = blankPos + dir;
tiles[blankPos] = tiles[newBlankPos];
blankPos = newBlankPos;
} while(blankPos != clickPos);
tiles[blankPos] = 0;ืืืจ ืึทื ืืืืืงืืขื ืื ื ืืฆื Swing API
ืขืก ืืื ืฆืืื ืฆื ืึทืจืืขืื ืืืืฃ ืื ืฆืืืื ื. ืขืจืฉืืขืจ ืืืจ ื ืขืืขื ืื Jpanel ืงืืึทืก. ืืขืจื ืึธื ืืืจ ืฆืืขื ืืึทืืก ืืืืฃ ืืขื ืคืขืื - ืฆื ืจืขืืขื ืขื ืื ืกืืืขืก ืคืื ืืขืืขืจ, ืืืจ ืืืขืื ื ืืฆื ืื ืืึทืื ืกืคึผืขืกืืคืืขื ืืื ืื ืฉืคึผืื ืงืึทื ืกืืจืึทืงืืขืจ ืคึผืึทืจืึทืืขืืขืจ:
gridSize = (dimโ - โ2 * margin);
tileSize = gridSize / size;ืืจืขื ืขืฅ ืืื ืืืื ืึท ืคึผืึทืจืึทืืขืืขืจ ืฉืืขืื ืืื ืื ืฉืคึผืื ืงืึทื ืกืืจืึทืงืืขืจ.
ืืืฆื ืืืจ ืืึทืจืคึฟื ืฆื ืืขืคืื ืืจื ืื drawGrid ืืืคึฟื ืฆื ืฆืืขื ืื ืืจืื ืืื ืกืคึผืึทืฅ ืืืืฃ ืืขื ืขืงืจืึทื. ืืืจ ืคืื ืึทื ืืขืจืงืืืึทืื ืื ืืขื ืืข ืคืื โโืืึทืืก ืืื ืืขืจ ืื ืงืึธืืึธืจืืึทื ืึทืฅ ืืื ืืึทื ืืฆืขืจ ืฆืืืื ื ืงืึธืืึธืจืืึทื ืึทืฅ. ืืขืจื ืึธื ืฆืืขื ืืขืืขืจ ืึธืจื ืืื ืื ืงืึธืจืึทืกืคึผืึทื ืืื ื ื ืืืขืจ ืืื ืืขื ืฆืขื ืืขืจ:
private void drawGrid(Graphics2D g) {
for (int i = 0; i < tiles.length; i++) {
// we convert 1D coords to 2D coords given the size of the 2D Array
int r = i / size;
int c = i % size;
// we convert in coords on the UI
int x = margin + c * tileSize;
int y = margin + r * tileSize;
// check special case for blank tile
if(tiles[i] == 0) {
if (gameOver) {
g.setColor(FOREGROUND_COLOR);
drawCenteredString(g, "u2713", x, y);
}
continue;
}
// for other tiles
g.setColor(getForeground());
g.fillRoundRect(x, y, tileSize, tileSize, 25, 25);
g.setColor(Color.BLACK);
g.drawRoundRect(x, y, tileSize, tileSize, 25, 25);
g.setColor(Color.WHITE);
drawCenteredString(g, String.valueOf(tiles[i]), x , y);
}
}ืฆืื ืกืืฃ, ืืึธืื ืืื ืื ืึธืืืืขืจืจืืื ืื PaintComponent ืืืคึฟื, ืืืึธืก ืืื ืืขืจืืืืื ืคืื ืื JPane ืงืืึทืก. ืืขืจื ืึธื ืืืจ ื ืืฆื ืื drawGrid ืืืคึฟื, ื ืืืืขืืื ืืขื ืืืจื ืื drawStartMessage ืืืคึฟื ืฆื ืืืืึทืื ืึท ืึธื ืืึธื ืืืึธืก ืคึผืจืึทืืคึผืืื ื ืืื ืื ืฆื ืืื ืฆื ืึธื ืืืืื ืืขื ืฉืคึผืื:
private void drawStartMessage(Graphics2D g) {
if (gameOver) {
g.setFont(getFont().deriveFont(Font.BOLD, 18));
g.setColor(FOREGROUND_COLOR);
String s = "Click to start new game";
g.drawString(s, (getWidth() - g.getFontMetrics().stringWidth(s)) / 2,
getHeight() - margin);
}
}
private void drawCenteredString(Graphics2D g, String s, int x, int y) {
// center string s for the given tile (x,y)
FontMetrics fm = g.getFontMetrics();
int asc = fm.getAscent();
int desc = fm.getDescent();
g.drawString(s, x + (tileSize - fm.stringWidth(s)) / 2,
y + (asc + (tileSize - (asc + desc)) / 2));
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2D = (Graphics2D) g;
g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
drawGrid(g2D);
drawStartMessage(g2D);
}ืจืขืึทืืืจื ืฆื ืืึทื ืืฆืขืจ ืึทืงืฉืึทื ื ืืื ืื ืื
ืึผืื ืื ืฉืคึผืื ืืึธื ืืืืคื, ืขืก ืืื ื ืืืืืง ืฆื ืคึผืจืึธืฆืขืก ืืึทื ืืฆืขืจ ืึทืงืฉืึทื ื ืืื ืื ืื. ืฆื ืืึธื ืืึธืก, ืืืืื ืื ืืืคึผืืึทืืขื ืืืืฉืึทื ืคืื MouseListener ืืืืฃ Jpanel ืืื ืื ืงืึธื ืคึฟืึทืจ ืืึธืืืื ื ืกืคึผืึทืฅ, ืฉืืื ืืขืืืืื ืืืืื:
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
// used to let users to interact on the grid by clicking
// it's time to implement interaction with users to move tiles to solve the game !
if (gameOver) {
newGame();
} else {
// get position of the click
int ex = e.getX() - margin;
int ey = e.getY() - margin;
// click in the grid ?
if (ex < 0 || ex > gridSize || ey < 0 || ey > gridSize)
return;
// get position in the grid
int c1 = ex / tileSize;
int r1 = ey / tileSize;
// get position of the blank cell
int c2 = blankPos % size;
int r2 = blankPos / size;
// we convert in the 1D coord
int clickPos = r1 * size + c1;
int dir = 0;
// we search direction for multiple tile moves at once
if (c1 == c2 && Math.abs(r1 - r2) > 0)
dir = (r1 - r2) > 0 ? size : -size;
else if (r1 == r2 && Math.abs(c1 - c2) > 0)
dir = (c1 - c2) > 0 ? 1 : -1;
if (dir != 0) {
// we move tiles in the direction
do {
int newBlankPos = blankPos + dir;
tiles[blankPos] = tiles[newBlankPos];
blankPos = newBlankPos;
} while(blankPos != clickPos);
tiles[blankPos] = 0;
}
// we check if game is solved
gameOver = isSolved();
}
// we repaint panel
repaint();
}
});ืืืจ ืฉืืขืื ืืขื ืงืึธื ืืื ืื ืงืึทื ืกืืจืึทืงืืขืจ ืคืื ืื GameOfFifteen ืงืืึทืก. ืืื ืื ืกืืฃ, ืืืจ ืจืืคื ืื newGame ืืืคึฟื ืฆื ืึธื ืืืืื ืึท ื ืืึทืข ืฉืคึผืื.
ืืึทื ืฅ ืฉืคึผืื ืงืึธื
ืื ืืขืฆืืข ืฉืจืื ืืืืืขืจ ืืืจ ืืขื ืื ืฉืคึผืื ืืื ืงืึทืืฃ ืืื ืฆื ืฉืืขืื ืึทืืข ืื ืงืึธื ืขืืขืืขื ืื ืฆืืืึทืืขื. ืืึธ ืก ืืืึธืก ืืึทืคึผืึทื ื:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
// We are going to create a Game of 15 Puzzle with Java 8 and Swing
// If you have some questions, feel free to read comments ;)
public class GameOfFifteen extends JPanel { // our grid will be drawn in a dedicated Panel
// Size of our Game of Fifteen instance
private int size;
// Number of tiles
private int nbTiles;
// Grid UI Dimension
private int dimension;
// Foreground Color
private static final Color FOREGROUND_COLOR = new Color(239, 83, 80); // we use arbitrary color
// Random object to shuffle tiles
private static final Random RANDOM = new Random();
// Storing the tiles in a 1D Array of integers
private int[] tiles;
// Size of tile on UI
private int tileSize;
// Position of the blank tile
private int blankPos;
// Margin for the grid on the frame
private int margin;
// Grid UI Size
private int gridSize;
private boolean gameOver; // true if game over, false otherwise
public GameOfFifteen(int size, int dim, int mar) {
this.size = size;
dimension = dim;
margin = mar;
// init tiles
nbTiles = size * size - 1; // -1 because we don't count blank tile
tiles = new int[size * size];
// calculate grid size and tile size
gridSize = (dim - 2 * margin);
tileSize = gridSize / size;
setPreferredSize(new Dimension(dimension, dimension + margin));
setBackground(Color.WHITE);
setForeground(FOREGROUND_COLOR);
setFont(new Font("SansSerif", Font.BOLD, 60));
gameOver = true;
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
// used to let users to interact on the grid by clicking
// it's time to implement interaction with users to move tiles to solve the game !
if (gameOver) {
newGame();
} else {
// get position of the click
int ex = e.getX() - margin;
int ey = e.getY() - margin;
// click in the grid ?
if (ex < 0 || ex > gridSize || ey < 0 || ey > gridSize)
return;
// get position in the grid
int c1 = ex / tileSize;
int r1 = ey / tileSize;
// get position of the blank cell
int c2 = blankPos % size;
int r2 = blankPos / size;
// we convert in the 1D coord
int clickPos = r1 * size + c1;
int dir = 0;
// we search direction for multiple tile moves at once
if (c1 == c2 && Math.abs(r1 - r2) > 0)
dir = (r1 - r2) > 0 ? size : -size;
else if (r1 == r2 && Math.abs(c1 - c2) > 0)
dir = (c1 - c2) > 0 ? 1 : -1;
if (dir != 0) {
// we move tiles in the direction
do {
int newBlankPos = blankPos + dir;
tiles[blankPos] = tiles[newBlankPos];
blankPos = newBlankPos;
} while(blankPos != clickPos);
tiles[blankPos] = 0;
}
// we check if game is solved
gameOver = isSolved();
}
// we repaint panel
repaint();
}
});
newGame();
}
private void newGame() {
do {
reset(); // reset in intial state
shuffle(); // shuffle
} while(!isSolvable()); // make it until grid be solvable
gameOver = false;
}
private void reset() {
for (int i = 0; i < tiles.length; i++) {
tiles[i] = (i + 1) % tiles.length;
}
// we set blank cell at the last
blankPos = tiles.length - 1;
}
private void shuffle() {
// don't include the blank tile in the shuffle, leave in the solved position
int n = nbTiles;
while (n > 1) {
int r = RANDOM.nextInt(n--);
int tmp = tiles[r];
tiles[r] = tiles[n];
tiles[n] = tmp;
}
}
// Only half permutations of the puzzle are solvable.
// Whenever a tile is preceded by a tile with higher value it counts
// as an inversion. In our case, with the blank tile in the solved position,
// the number of inversions must be even for the puzzle to be solvable
private boolean isSolvable() {
int countInversions = 0;
for (int i = 0; i < nbTiles; i++) {
for (int j = 0; j < i; j++) {
if (tiles[j] > tiles[i])
countInversions++;
}
}
return countInversions % 2 == 0;
}
private boolean isSolved() {
if (tiles[tiles.length - 1] != 0) // if blank tile is not in the solved position ==> not solved
return false;
for (int i = nbTiles - 1; i >= 0; i--) {
if (tiles[i] != i + 1)
return false;
}
return true;
}
private void drawGrid(Graphics2D g) {
for (int i = 0; i < tiles.length; i++) {
// we convert 1D coords to 2D coords given the size of the 2D Array
int r = i / size;
int c = i % size;
// we convert in coords on the UI
int x = margin + c * tileSize;
int y = margin + r * tileSize;
// check special case for blank tile
if(tiles[i] == 0) {
if (gameOver) {
g.setColor(FOREGROUND_COLOR);
drawCenteredString(g, "u2713", x, y);
}
continue;
}
// for other tiles
g.setColor(getForeground());
g.fillRoundRect(x, y, tileSize, tileSize, 25, 25);
g.setColor(Color.BLACK);
g.drawRoundRect(x, y, tileSize, tileSize, 25, 25);
g.setColor(Color.WHITE);
drawCenteredString(g, String.valueOf(tiles[i]), x , y);
}
}
private void drawStartMessage(Graphics2D g) {
if (gameOver) {
g.setFont(getFont().deriveFont(Font.BOLD, 18));
g.setColor(FOREGROUND_COLOR);
String s = "Click to start new game";
g.drawString(s, (getWidth() - g.getFontMetrics().stringWidth(s)) / 2,
getHeight() - margin);
}
}
private void drawCenteredString(Graphics2D g, String s, int x, int y) {
// center string s for the given tile (x,y)
FontMetrics fm = g.getFontMetrics();
int asc = fm.getAscent();
int desc = fm.getDescent();
g.drawString(s, x + (tileSize - fm.stringWidth(s)) / 2,
y + (asc + (tileSize - (asc + desc)) / 2));
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2D = (Graphics2D) g;
g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
drawGrid(g2D);
drawStartMessage(g2D);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Game of Fifteen");
frame.setResizable(false);
frame.add(new GameOfFifteen(4, 550, 30), BorderLayout.CENTER);
frame.pack();
// center on the screen
frame.setLocationRelativeTo(null);
frame.setVisible(true);
});
}
}ืฆืื ืกืืฃ, ืืึธืืืจ ืฉืคึผืืื!
ืขืก ืืื ืฆืืื ืฆื ืงืึทืืขืจ ืื ืฉืคึผืื ืืื ืคึผืจืืืืจื ืขืก ืืื ืงืึทืืฃ. ืื ืคืขืื ืืึธื ืงืืงื ืืื ืืึธืก:
ืืื ืก ืคึผืจืืืืจื ืฆื ืกืึธืืืืข ืื ืจืขืืขื ืืฉ. ืืืื ืึทืืฅ ืืื ืืื, ืืืจ ืืึทืงืืืขื ืืขื:
ืึทื ืก ืึทืืข. ืืึธื ืืืจ ืืขืจืืืึทืจืื ืืขืจ? ๐
Skillbox ืจืขืงืึทืืขื ืื:
- ืคึผืจืึทืงืืืฉ ืงืืจืก .
- ืึทืคึผืคึผืืืขื ืึธื ืืืื ืงืืจืก .
- ืฆืืืื-ืืึธืจ ืคึผืจืึทืงืืืฉ ืงืืจืก .
ืืงืืจ: www.habr.com
