Snake/Java: Difference between revisions
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m undo revision 057AB6 by Aal (talk): vandalism/test edit |
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==Code== |
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System.out.println ("Hello World"); |
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{{works with|Java|8}} |
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<lang java> |
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/***************************************************/ |
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/* Sourced By Samuel Dennis */ |
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/* */ |
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/* Created On (09/01/2019) */ |
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/* Last Editied (11/18/2019) */ |
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/***************************************************/ |
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import java.awt.*; |
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import java.awt.event.*; |
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import static java.lang.String.format; |
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import java.util.*; |
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import java.util.List; |
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import javax.swing.*; |
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public class TestCodeSnake extends JPanel implements Runnable { |
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enum Dir { |
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up(0, -1), right(1, 0), down(0, 1), left(-1, 0); |
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Dir(int x, int y) { |
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this.x = x; this.y = y; |
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} |
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final int x, y; |
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} |
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static final Random rand = new Random(); |
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static final int WALL = -1; |
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static final int MAX_ENERGY = 1500; |
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volatile boolean gameOver = true; |
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Thread gameThread; |
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int score, hiScore; |
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int nRows = 44; |
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int nCols = 64; |
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Dir dir; |
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int energy; |
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int[][] grid; |
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List<Point> snake, treats; |
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Font smallFont; |
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public TestCodeSnake() { |
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setPreferredSize(new Dimension(640, 440)); |
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setBackground(Color.WHITE); |
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setFont(new Font("TimesNewRoman", Font.BOLD, 48)); |
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setFocusable(true); |
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smallFont = getFont().deriveFont(Font.BOLD, 18); |
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initGrid(); |
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addMouseListener( |
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new MouseAdapter() { |
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@Override |
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public void mousePressed(MouseEvent e) { |
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if (gameOver) { |
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startNewGame(); |
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repaint(); |
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} |
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} |
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}); |
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addKeyListener( |
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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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if (dir != Dir.down) |
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dir = Dir.up; |
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break; |
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case KeyEvent.VK_LEFT: |
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if (dir != Dir.right) |
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dir = Dir.left; |
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break; |
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case KeyEvent.VK_RIGHT: |
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if (dir != Dir.left) |
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dir = Dir.right; |
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break; |
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case KeyEvent.VK_DOWN: |
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if (dir != Dir.up) |
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dir = Dir.down; |
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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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void startNewGame() { |
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gameOver = false; |
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stop(); |
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initGrid(); |
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treats = new LinkedList<>(); |
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dir = Dir.left; |
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energy = MAX_ENERGY; |
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if (score > hiScore) |
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hiScore = score; |
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score = 0; |
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snake = new ArrayList<>(); |
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for (int x = 0; x < 7; x++) |
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snake.add(new Point(nCols / 2 + x, nRows / 2)); |
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do |
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addTreat(); |
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while(treats.isEmpty()); |
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(gameThread = new Thread(this)).start(); |
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} |
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void stop() { |
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if (gameThread != null) { |
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Thread tmp = gameThread; |
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gameThread = null; |
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tmp.interrupt(); |
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} |
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} |
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void initGrid() { |
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grid = new int[nRows][nCols]; |
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for (int r = 0; r < nRows; r++) { |
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for (int c = 0; c < nCols; c++) { |
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if (c == 0 || c == nCols - 1 || r == 0 || r == nRows - 1) |
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grid[r][c] = WALL; |
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} |
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} |
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} |
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@Override |
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public void run() { |
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while (Thread.currentThread() == gameThread) { |
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try { |
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Thread.sleep(Math.max(75 - score, 25)); |
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} catch (InterruptedException e) { |
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return; |
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} |
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if (energyUsed() || hitsWall() || hitsSnake()) { |
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gameOver(); |
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} else { |
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if (eatsTreat()) { |
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score++; |
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energy = MAX_ENERGY; |
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growSnake(); |
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} |
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moveSnake(); |
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addTreat(); |
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} |
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repaint(); |
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} |
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} |
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boolean energyUsed() { |
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energy -= 10; |
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return energy <= 0; |
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} |
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boolean hitsWall() { |
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Point head = snake.get(0); |
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int nextCol = head.x + dir.x; |
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int nextRow = head.y + dir.y; |
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return grid[nextRow][nextCol] == WALL; |
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} |
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boolean hitsSnake() { |
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Point head = snake.get(0); |
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int nextCol = head.x + dir.x; |
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int nextRow = head.y + dir.y; |
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for (Point p : snake) |
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if (p.x == nextCol && p.y == nextRow) |
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return true; |
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return false; |
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} |
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boolean eatsTreat() { |
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Point head = snake.get(0); |
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int nextCol = head.x + dir.x; |
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int nextRow = head.y + dir.y; |
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for (Point p : treats) |
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if (p.x == nextCol && p.y == nextRow) { |
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return treats.remove(p); |
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} |
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return false; |
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} |
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void gameOver() { |
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gameOver = true; |
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stop(); |
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} |
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void moveSnake() { |
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for (int i = snake.size() - 1; i > 0; i--) { |
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Point p1 = snake.get(i - 1); |
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Point p2 = snake.get(i); |
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p2.x = p1.x; |
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p2.y = p1.y; |
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} |
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Point head = snake.get(0); |
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head.x += dir.x; |
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head.y += dir.y; |
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} |
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void growSnake() { |
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Point tail = snake.get(snake.size() - 1); |
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int x = tail.x + dir.x; |
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int y = tail.y + dir.y; |
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snake.add(new Point(x, y)); |
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} |
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void addTreat() { |
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if (treats.size() < 3) { |
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if (rand.nextInt(10) == 0) { // 1 in 10 |
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if (rand.nextInt(4) != 0) { // 3 in 4 |
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int x, y; |
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while (true) { |
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x = rand.nextInt(nCols); |
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y = rand.nextInt(nRows); |
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if (grid[y][x] != 0) |
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continue; |
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Point p = new Point(x, y); |
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if (snake.contains(p) || treats.contains(p)) |
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continue; |
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treats.add(p); |
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break; |
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} |
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} else if (treats.size() > 1) |
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treats.remove(0); |
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} |
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} |
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} |
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void drawGrid(Graphics2D g) { |
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g.setColor(Color.black); |
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for (int r = 0; r < nRows; r++) { |
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for (int c = 0; c < nCols; c++) { |
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if (grid[r][c] == WALL) |
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g.fillRect(c * 10, r * 10, 10, 10); |
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} |
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} |
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} |
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void drawSnake(Graphics2D g) { |
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g.setColor(Color.red); |
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for (Point p : snake) |
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g.fillRect(p.x * 10, p.y * 10, 10, 10); |
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g.setColor(energy < 500 ? Color.red : Color.orange); |
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Point head = snake.get(0); |
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g.fillRect(head.x * 10, head.y * 10, 10, 10); |
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} |
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void drawTreats(Graphics2D g) { |
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g.setColor(Color.green); |
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for (Point p : treats) |
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g.fillRect(p.x * 10, p.y * 10, 10, 10); |
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} |
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void drawStartScreen(Graphics2D g) { |
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g.setColor(Color.red); |
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g.setFont(getFont()); |
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g.drawString("SNAKE", 240, 190); |
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g.setColor(Color.orange); |
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g.setFont(smallFont); |
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g.drawString("(Click To START)", 250, 240); |
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} |
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void drawScore(Graphics2D g) { |
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int h = getHeight(); |
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g.setFont(smallFont); |
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g.setColor(getForeground()); |
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String s = format("Hi-Score: %d Score: %d", hiScore, score); |
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g.drawString(s, 30, h - 30); |
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g.drawString(format("Energy: %d", energy), getWidth() - 150, h - 30); |
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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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if (gameOver) { |
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drawStartScreen(g); |
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} else { |
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drawSnake(g); |
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drawTreats(g); |
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drawScore(g); |
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} |
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} |
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public static void main(String[] args) { |
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SwingUtilities.invokeLater( |
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() -> { |
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JFrame mainFrame = new JFrame(); |
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mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); |
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mainFrame.setTitle("SNAKE"); |
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mainFrame.setResizable(true); |
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mainFrame.add(new TestCodeSnake(), BorderLayout.CENTER); |
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mainFrame.pack(); |
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mainFrame.setLocationRelativeTo(null); |
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mainFrame.setVisible(true); |
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}); |
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} |
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}</lang> |