贪吃蛇(JAVA实现)源代码

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.*; // ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝ // Main Class // ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝ public class GreedSnake implements KeyListener { JFrame mainFrame; Canvas paintCanvas; JLabel labelScore;// 计分牌 SnakeModel snakeModel = null;// 蛇 public static final int canvasWidth = 500; public static final int canvasHeight = 350; public static final int nodeWidth = 10; public static final int nodeHeight = 10; // ---------------------------------------------------------------------- // GreedSnake():初始化游戏界面 // ---------------------------------------------------------------------- public GreedSnake() { // 设置界面元素 mainFrame = new JFrame("GreedSnake"); Container cp = mainFrame.getContentPane(); labelScore = new JLabel("Score:"); cp.add(labelScore, BorderLayout.NORTH); paintCanvas = new Canvas(); paintCanvas.setSize(canvasWidth + 1, canvasHeight + 1); paintCanvas.addKeyListener(this); cp.add(paintCanvas, BorderLayout.CENTER); JPanel panelButtom = new JPanel(); panelButtom.setLayout(new BorderLayout()); JLabel labelHelp;// 帮助信息 labelHelp = new JLabel("PageUp, PageDown for speed;", JLabel.CENTER); panelButtom.add(labelHelp, BorderLayout.NORTH); labelHelp = new JLabel("ENTER or R or S for start;", JLabel.CENTER); panelButtom.add(labelHelp, BorderLayout.CENTER); labelHelp = new JLabel("SPACE or P for pause", JLabel.CENTER); panelButtom.add(labelHelp, BorderLayout.SOUTH); cp.add(panelButtom, BorderLayout.SOUTH); mainFrame.addKeyListener(this); //mainFrame.pack(); mainFrame.setBounds(500, 250, canvasWidth + 10, canvasHeight + 100); mainFrame.setResizable(false); mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); mainFrame.setVisible(true); begin(); } // ---------------------------------------------------------------------- // keyPressed():按键检测 // ---------------------------------------------------------------------- public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); if (snakeModel.running) switch (keyCode) { case KeyEvent.VK_UP: snakeModel.changeDirection(SnakeModel.UP); break; case KeyEvent.VK_DOWN: snakeModel.changeDirection(SnakeModel.DOWN); break; case KeyEvent.VK_LEFT: snakeModel.changeDirection(SnakeModel.LEFT); break; case KeyEvent.VK_RIGHT: snakeModel.changeDirection(SnakeModel.RIGHT); break; case KeyEvent.VK_ADD: case KeyEvent.VK_PAGE_UP: snakeModel.speedUp();// 加速 break; case KeyEvent.VK_SUBTRACT: case KeyEvent.VK_PAGE_DOWN: snakeModel.speedDown();// 减速 break; case KeyEvent.VK_SPACE: case KeyEvent.VK_P: snakeModel.changePauseState();// 暂停或继续 break; default: } // 重新开始 if (keyCode == KeyEvent.VK_R || keyCode == KeyEvent.VK_S || keyCode == KeyEvent.VK_ENTER) { snakeModel.running = false; begin(); } } // ---------------------------------------------------------------------- // keyReleased（）：空函数 // ---------------------------------------------------------------------- public void keyReleased(KeyEvent e) { } // ---------------------------------------------------------------------- // keyTyped（）：空函数 // ---------------------------------------------------------------------- public void keyTyped(KeyEvent e) { } // ---------------------------------------------------------------------- // repaint（）：绘制游戏界面（包括蛇和食物） // ---------------------------------------------------------------------- void repaint() { Graphics g = paintCanvas.getGraphics(); // draw background g.setColor(Color.WHITE); g.fillRect(0, 0, canvasWidth, canvasHeight); // draw the snake g.setColor(Color.BLACK); LinkedList na = snakeModel.nodeArray; Iterator it = na.iterator(); while (it.hasNext()) { Node n = (Node) it.next(); drawNode(g, n); } // draw the food g.setColor(Color.RED); Node n = snakeModel.food; drawNode(g, n); updateScore(); } // ---------------------------------------------------------------------- // drawNode（）：绘画某一结点（蛇身或食物） // ---------------------------------------------------------------------- private void drawNode(Graphics g, Node n) { g.fillRect(n.x * nodeWidth, n.y * nodeHeight, nodeWidth - 1, nodeHeight - 1); } // ---------------------------------------------------------------------- // updateScore（）：改变计分牌 // ---------------------------------------------------------------------- public void updateScore() { String s = "Score: " + snakeModel.score+" world:"+snakeModel.world; labelScore.setText(s); } // ---------------------------------------------------------------------- // begin（）：游戏开始，放置贪吃蛇 // ---------------------------------------------------------------------- void begin() { if (snakeModel == null || !snakeModel.running) { snakeModel = new SnakeModel(this, canvasWidth / nodeWidth, this.canvasHeight / nodeHeight); (new Thread(snakeModel)).start(); } } // ---------------------------------------------------------------------- // main（）：主函数 // ---------------------------------------------------------------------- public static void main(String[] args) { GreedSnake gs = new GreedSnake(); } }