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298
Task/2048/Java/2048.java
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298
Task/2048/Java/2048.java
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import java.awt.*;
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import java.awt.event.*;
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import java.util.Random;
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import javax.swing.*;
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public class Game2048 extends JPanel {
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enum State {
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start, won, running, over
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}
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final Color[] colorTable = {
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new Color(0x701710), new Color(0xFFE4C3), new Color(0xfff4d3),
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new Color(0xffdac3), new Color(0xe7b08e), new Color(0xe7bf8e),
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new Color(0xffc4c3), new Color(0xE7948e), new Color(0xbe7e56),
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new Color(0xbe5e56), new Color(0x9c3931), new Color(0x701710)};
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final static int target = 2048;
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static int highest;
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static int score;
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private Color gridColor = new Color(0xBBADA0);
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private Color emptyColor = new Color(0xCDC1B4);
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private Color startColor = new Color(0xFFEBCD);
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private Random rand = new Random();
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private Tile[][] tiles;
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private int side = 4;
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private State gamestate = State.start;
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private boolean checkingAvailableMoves;
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public Game2048() {
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setPreferredSize(new Dimension(900, 700));
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setBackground(new Color(0xFAF8EF));
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setFont(new Font("SansSerif", Font.BOLD, 48));
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setFocusable(true);
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addMouseListener(new MouseAdapter() {
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@Override
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public void mousePressed(MouseEvent e) {
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startGame();
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repaint();
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}
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});
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addKeyListener(new KeyAdapter() {
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@Override
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public void keyPressed(KeyEvent e) {
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switch (e.getKeyCode()) {
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case KeyEvent.VK_UP:
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moveUp();
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break;
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case KeyEvent.VK_DOWN:
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moveDown();
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break;
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case KeyEvent.VK_LEFT:
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moveLeft();
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break;
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case KeyEvent.VK_RIGHT:
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moveRight();
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break;
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}
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repaint();
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}
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});
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}
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@Override
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public void paintComponent(Graphics gg) {
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super.paintComponent(gg);
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Graphics2D g = (Graphics2D) gg;
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g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
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RenderingHints.VALUE_ANTIALIAS_ON);
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drawGrid(g);
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}
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void startGame() {
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if (gamestate != State.running) {
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score = 0;
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highest = 0;
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gamestate = State.running;
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tiles = new Tile[side][side];
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addRandomTile();
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addRandomTile();
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}
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}
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void drawGrid(Graphics2D g) {
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g.setColor(gridColor);
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g.fillRoundRect(200, 100, 499, 499, 15, 15);
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if (gamestate == State.running) {
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for (int r = 0; r < side; r++) {
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for (int c = 0; c < side; c++) {
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if (tiles[r][c] == null) {
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g.setColor(emptyColor);
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g.fillRoundRect(215 + c * 121, 115 + r * 121, 106, 106, 7, 7);
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} else {
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drawTile(g, r, c);
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}
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}
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}
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} else {
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g.setColor(startColor);
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g.fillRoundRect(215, 115, 469, 469, 7, 7);
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g.setColor(gridColor.darker());
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g.setFont(new Font("SansSerif", Font.BOLD, 128));
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g.drawString("2048", 310, 270);
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g.setFont(new Font("SansSerif", Font.BOLD, 20));
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if (gamestate == State.won) {
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g.drawString("you made it!", 390, 350);
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} else if (gamestate == State.over)
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g.drawString("game over", 400, 350);
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g.setColor(gridColor);
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g.drawString("click to start a new game", 330, 470);
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g.drawString("(use arrow keys to move tiles)", 310, 530);
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}
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}
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void drawTile(Graphics2D g, int r, int c) {
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int value = tiles[r][c].getValue();
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g.setColor(colorTable[(int) (Math.log(value) / Math.log(2)) + 1]);
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g.fillRoundRect(215 + c * 121, 115 + r * 121, 106, 106, 7, 7);
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String s = String.valueOf(value);
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g.setColor(value < 128 ? colorTable[0] : colorTable[1]);
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FontMetrics fm = g.getFontMetrics();
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int asc = fm.getAscent();
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int dec = fm.getDescent();
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int x = 215 + c * 121 + (106 - fm.stringWidth(s)) / 2;
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int y = 115 + r * 121 + (asc + (106 - (asc + dec)) / 2);
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g.drawString(s, x, y);
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}
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private void addRandomTile() {
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int pos = rand.nextInt(side * side);
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int row, col;
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do {
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pos = (pos + 1) % (side * side);
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row = pos / side;
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col = pos % side;
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} while (tiles[row][col] != null);
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int val = rand.nextInt(10) == 0 ? 4 : 2;
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tiles[row][col] = new Tile(val);
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}
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private boolean move(int countDownFrom, int yIncr, int xIncr) {
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boolean moved = false;
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for (int i = 0; i < side * side; i++) {
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int j = Math.abs(countDownFrom - i);
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int r = j / side;
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int c = j % side;
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if (tiles[r][c] == null)
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continue;
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int nextR = r + yIncr;
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int nextC = c + xIncr;
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while (nextR >= 0 && nextR < side && nextC >= 0 && nextC < side) {
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Tile next = tiles[nextR][nextC];
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Tile curr = tiles[r][c];
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if (next == null) {
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if (checkingAvailableMoves)
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return true;
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tiles[nextR][nextC] = curr;
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tiles[r][c] = null;
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r = nextR;
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c = nextC;
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nextR += yIncr;
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nextC += xIncr;
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moved = true;
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} else if (next.canMergeWith(curr)) {
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if (checkingAvailableMoves)
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return true;
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int value = next.mergeWith(curr);
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if (value > highest)
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highest = value;
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score += value;
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tiles[r][c] = null;
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moved = true;
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break;
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} else
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break;
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}
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}
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if (moved) {
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if (highest < target) {
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clearMerged();
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addRandomTile();
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if (!movesAvailable()) {
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gamestate = State.over;
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}
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} else if (highest == target)
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gamestate = State.won;
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}
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return moved;
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}
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boolean moveUp() {
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return move(0, -1, 0);
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}
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boolean moveDown() {
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return move(side * side - 1, 1, 0);
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}
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boolean moveLeft() {
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return move(0, 0, -1);
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}
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boolean moveRight() {
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return move(side * side - 1, 0, 1);
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}
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void clearMerged() {
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for (Tile[] row : tiles)
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for (Tile tile : row)
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if (tile != null)
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tile.setMerged(false);
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}
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boolean movesAvailable() {
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checkingAvailableMoves = true;
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boolean hasMoves = moveUp() || moveDown() || moveLeft() || moveRight();
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checkingAvailableMoves = false;
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return hasMoves;
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}
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public static void main(String[] args) {
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SwingUtilities.invokeLater(() -> {
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JFrame f = new JFrame();
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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f.setTitle("2048");
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f.setResizable(true);
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f.add(new Game2048(), BorderLayout.CENTER);
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f.pack();
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f.setLocationRelativeTo(null);
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f.setVisible(true);
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});
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}
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}
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class Tile {
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private boolean merged;
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private int value;
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Tile(int val) {
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value = val;
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}
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int getValue() {
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return value;
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}
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void setMerged(boolean m) {
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merged = m;
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}
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boolean canMergeWith(Tile other) {
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return !merged && other != null && !other.merged && value == other.getValue();
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}
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int mergeWith(Tile other) {
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if (canMergeWith(other)) {
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value *= 2;
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merged = true;
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return value;
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}
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return -1;
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}
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}
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