贪吃蛇源代码.doc

/文件名：SnakeMIDlet .javapackage snake;import javax.microedition.midlet.*;import javax.microedition.lcdui.*;public class SnakeMIDlet extends MIDlet SnakeCanvas displayable = new SnakeCanvas(); public SnakeMIDlet() Display.getDisplay(this).setCurrent(displayable); public void startApp() public void pauseApp() public void destroyApp(boolean unconditional) /文件名：SnakeCanvas.javapackage snake;import java.util.*;import javax.microedition.lcdui.*;/* 贪吃蛇游戏*/public class SnakeCanvas extends Canvas implements Runnable /*存储贪吃蛇节点坐标,其中第二维下标为0的x坐标，第二维下标是1的y坐标*/ int snake = new int2002; /*已经使用的节点数量*/ int snakeNum; /*贪吃蛇运动方向,0向上，1向下,2向左,3向右*/ int direction; /*移动方向*/ /*向上*/ private final int DIRECTION_UP = 0; /*向下*/ private final int DIRECTION_DOWN = 1; /*向左*/ private final int DIRECTION_LEFT = 2; /*向右*/ private final int DIRECTION_RIGHT = 3; /*游戏区域宽度*/ int width; /*游戏区域高度*/ int height; /*蛇身单元宽度*/ private final byte SNAKEWIDTH = 4; /*是否处于暂停状态,true暂停*/ boolean isPaused = false; /*是否处于运行状态,true运行*/ boolean isRun = true; /*时间间隔*/ private final int SLEEP_TIME = 300; /*食物的X坐标*/ int foodX; /*食物的Y坐标*/ int foodY; /*食物的闪烁控制*/ boolean b = true; /*Random对象*/ Random random = new Random(); public SnakeCanvas() /初始化 init(); width = this.getWidth(); height = this.getHeight(); /启动线程 new Thread(this).start(); /* * 初始化开始数据 */ private void init() /初始化节点数量 snakeNum = 7; /初始化节点数据 for(int i = 0;i snakeNum;i+) snake0 = 100 - SNAKEWIDTH * i; snake1 = 40; /初始化移动方向 direction = DIRECTION_RIGHT; /初始化食物坐标 foodX = 100; foodY = 100; protected void paint(Graphics g) /清屏 g.setColor(0xffffff); g.fillRect(0,0,width,height); g.setColor(0); /绘制蛇身 for(int i = 0;i 0;i-) snake0 = snakei - 10; snake1 = snakei - 11; /第一个单元格移动 switch(direction) case DIRECTION_UP: snake01 = snake01 - SNAKEWIDTH; break; case DIRECTION_DOWN: snake01 = snake01 + SNAKEWIDTH; break; case DIRECTION_LEFT: snake00 = snake00 - SNAKEWIDTH; break; case DIRECTION_RIGHT: snake00 = snake00 + SNAKEWIDTH; break; /* * 吃掉食物，自身增长 */ private void eatFood() /判别蛇头是否和食物重叠 if(snake00 = foodX & snake01 = foodY) snakeNum+; generateFood(); /* * 产生食物 * 说明：食物的坐标必须位于屏幕内，且不能和蛇身重合 */ private void generateFood() while(true) foodX = Math.abs(random.nextInt() % (width - SNAKEWIDTH + 1) / SNAKEWIDTH * SNAKEWIDTH; foodY = Math.abs(random.nextInt() % (height - SNAKEWIDTH + 1) / SNAKEWIDTH * SNAKEWIDTH; boolean b = true; for(int i = 0;i snakeNum;i+) if(foodX = snake0 & snake1 = foodY) b = false; break; if(b) break; /* * 判断游戏是否结束 * 结束条件： * 1、蛇头超出边界 * 2、蛇头碰到自身 */ private boolean isGameOver() /边界判别 if(snake00 (width - SNAKEWIDTH) | snake01 (height - SNAKEWIDTH) return true; /碰到自身 for(int i = 4;i snakeNum;i+) if(snake00 = snake0 & snake01 = snake1) return true; return false; /* * 事件处理 */ public void keyPressed(int keyCode) int action = this.getGameAction(keyCode); /改变方向 switch(action) case UP: if(direction != DIRECTION_DOWN) direction = DIRECTION_UP; break; case DOWN: if(direction != DIRECTION_UP) direction = DIRECTION_DOWN; break; case LEFT: if(direction != DIRECTION_RIGHT) direction = DIRECTION_LEFT; break; case RIGHT: if(direction != DIRECTION_LEFT) direction = DIRECTION_RIGHT; break; case FIRE: /暂停和继续 isPaused = !isPaused; break; /* * 线程方法 * 使用精确延时 */ public void run() try while (isRun) /开始时间 long start = System.currentTimeMillis(); if(!isPaused) /吃食物 eatFood(); /移动 move(direction); /结束游戏 if(isGame