采用java制作的手机小游戏

import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Graphics; import javax.microedition.lcdui.Image; public class MyCanvas extends Canvas implements Runnable { static int time; static int num = 6;//目标小球的个数 static java.util.Random random = new java.util.Random(); boolean up, down, left, right;//玩家移动方向 int y = 10, x = 10; int speed_y = 5, speed_x = 4; Ball[] b = new Ball[100];// 子弹个数 MyBall[] sb = new MyBall[num]; Player p;//玩家 Image imgWin;//成功时显示的图片 Image imgDefeat;//失败时显示的图片 boolean status;//状态，显示游戏是否运行 boolean iswin; private int width, height;//屏幕的高宽 public MyCanvas() { width = getWidth(); height = getHeight(); p = new Player(30,0);//玩家的初始位置 for (int i = 0; i < num; i++) { sb[i] = new MyBall(0, 0,width, height, 0x000000); } try { imgWin=Image.createImage("/win.png"); imgDefeat=Image.createImage("/defeat.png"); } catch (Exception e) {} status = true;//状态初始设置为真 } /** * 所有画面显示的内容 */ public void paint(Graphics g) { g.setColor(71, 168, 34);//背景色 g.fillRect(0, 0, width, height); if(p != null) p.draw(g); for (int i = 0; i < b.length; i++) { if (b[i] != null) { b[i].draw(g); } } for (int i = 0; i < num; i++) { if (sb[i] != null) sb[i].draw(g); } if(status == false) { if(iswin == true) g.drawImage(imgWin, (int)(width-111)/2, (int)(height-139)/2, 0);//显示成功图片 else g.drawImage(imgDefeat, (int)(width-176)/2, (int)(height-220)/2, 0);//显示失败图片 } } public void isWin() { if(status==false) return; /* * 如果玩家失败，游戏结束，显示失败的图片 * 如果玩家成功，游戏结束，显示成功的图片 */ if(p==null) { iswin = false;//失败 status = false;//结束游戏； for(int i = 0;i<num;i++)//目标球消失，显示失败图片 { sb[i]=null; } return; } boolean flag=true;//球是否击中完标志 for(int i = 0;i<num;i++) { if(sb[i]!=null) { status=true; flag = false;//球未击中完 } } if(flag)//如果球击中完毕，玩家成功，游戏结束，显示成功图片 { status = false; iswin = true; p=null; } } public void cycle() { time++; isWin(); if(p==null) { for(int i = 0;i<b.length;i++) b[i]=null; return; } boolean flag = false; //玩家逻辑行为 if (up) { p.setFace(0); if (p.getY() - 5 >= 0) p.setY(p.getY() - 5); } if (down) { p.setFace(2); if (p.getY() + 5 <= height - 32) p.setY(p.getY() + 5); } if (left) { p.setFace(3); if (p.getX() - 5 >= 0) p.setX(p.getX() - 5); } if (right) { p.setFace(1); if (p.getX() + 5 <= width - 24) p.setX(p.getX() + 5); } // 目标球的逻辑行为 for(int i = 0;i<num;i++) { //球与玩家是否碰撞 if(sb[i]!=null && isIntersectingRect(p.getX(),p.getY(),24,32,(int)sb[i].x,(int)sb[i].y,(int)sb[i].r*2,(int)sb[i].r*2)) { p=null; break; } } for (int j = 0; j < num; j++) { if (sb[j] != null) { sb[j].cycle(); } } for (int i = 0; i < b.length; i++) { if (b[i] != null) { b[i].cycle(); if (b[i].getY() < 0) { b[i] = null; } //子弹是否和目标球相碰撞，碰撞后子弹和球都消失 for (int j = 0; j < num; j++) { if (sb[j] != null) { flag = isIntersectingRect(b[i].getX(), b[i].getY(), 6, 6, (int)sb[j].x, (int)sb[j].y, (int)sb[j].r*2, (int)sb[j].r*2); if (flag) { b[i] = null; sb[j] = null; break; } } } } } } /** * 设置玩家的朝向 *（0:上， 1右 ， 2下， 3左） */ public void keyPressed(int keyCode) { if(p==null) return; switch (getGameAction(keyCode)) { case UP: up = true; p.setFace(0); break; case DOWN: down = true; p.setFace(2); break; case LEFT: left = true; p.setFace(3); break; case RIGHT: right = true; p.setFace(1); break; case FIRE: for (int i = 0; i < b.length; i++) { if (b[i] == null) { switch (p.getFace()) { case 0: b[i] = new Ball(p.getX() + 9, p.getY(), 6, 6, 0xff0000,0); break; case 1: b[i] = new Ball(p.getX() + 24, p.getY() + 13, 6, 6,0xff0000, 1); break; case 2: b[i] = new Ball(p.getX() + 9, p.getY() + 32, 6, 6,0xff0000, 2); break; case 3: b[i] = new Ball(p.getX(), p.getY() + 13, 6, 6,0xff0000, 3); break; } break; } } break; } } public void keyReleased(int keyCode) { switch (getGameAction(keyCode)) { case UP: up = false; break; case DOWN: down = false; break; case LEFT: left = false; break; case RIGHT: right = false; break; } } public void run() { while (true) { try { cycle(); repaint(); Thread.sleep(20); } catch (Exception e) { } } } public void start() { Thread t = new Thread(this); t.start(); } public static final boolean isIntersectingRect(int ax, int ay, int aw, int ah, int bx, int by, int bw, int bh) { if (by + bh < ay || by > ay + ah || bx + bw < ax || bx > ax + aw) return false; return true; } }