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