J2ME小游戏-fly

http://www.diybl.com/　2007-2-6 　网络　点击: 　[ 评论 ]

1、FlyMidlet.java

package fly;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.*;

/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2004
* Company: 
* @author not attributable
* @version 1.0
*/

public class FlyMidlet extends MIDlet {
Navigate ng;
public FlyMidlet() {
ng=Navigate.getInstance(this);
}
protected void startApp() {
System.out.println("startApp");
ng.display.setCurrent(ng.mc);
printInfo();
}
protected void pauseApp() {
System.out.println("pauseApp");
}
protected void destroyApp(boolean parm1) {
System.out.println("destroyApp");
Navigate.mc.stop();
MyGameCanvas.cleanJob();
Navigate.cleanJob();
}

private void printInfo(){
System.out.println("FlyMidlet printInfo() start:");
System.out.println("FlyMidlet printInfo() end:");
}

}

2、Bullets.java

package fly;
import javax.microedition.lcdui.game.*;
import javax.microedition.lcdui.*;
import java.util.Random;
/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2004
* Company: 
* @author not attributable
* @version 1.0
*/

public class Bullets extends GameObject {
private int[][] bullets;
private int bulletstotal;
private Random rnd;
public static final int BULLET_TYPE_LEFT=0;
public static final int BULLET_TYPE_RIGHT=1;
public static final int BULLET_TYPE_TOP=2;
public static final int BULLET_TYPE_BOTTOM=3;
private int width,height;

public Bullets(Image img,int picwidth,int picheight,int bulletstotal,int width,int height) {
super(img,picwidth,picheight);
this.bulletstotal=bulletstotal;
bullets=new int[bulletstotal][6];
rnd=new Random();
this.width=width;
this.height=height;
}

public void initBullets(){
for (int i = 0; i < bullets.length; i++) {
initBullet(i);
}
}

private void initBullet(int i) {
bullets[i][0] = (rnd.nextInt() & 0x7fffffff) % 4; //type
bullets[i][5] = 1; //alive
switch (bullets[i][0]) {
case BULLET_TYPE_LEFT:
bullets[i][1] = -5;
bullets[i][2] = (rnd.nextInt() & 0x7fffffff) % height;
bullets[i][3] = (rnd.nextInt() & 0x7fffffff) % 3 + 1; //vx
bullets[i][4] = (rnd.nextInt()) % 3; //vy
break;
case BULLET_TYPE_RIGHT:
bullets[i][1] = width + 5;
bullets[i][2] = (rnd.nextInt() & 0x7fffffff) % height;
bullets[i][3] = ( (rnd.nextInt() & 0x7fffffff) % 3 + 1) * -1; //vx
bullets[i][4] = (rnd.nextInt()) % 3; //vy
break;
case BULLET_TYPE_TOP:
bullets[i][1] = (rnd.nextInt() & 0x7fffffff) % width;
bullets[i][2] = -5;
bullets[i][3] = (rnd.nextInt()) % 3; //vx
bullets[i][4] = (rnd.nextInt() & 0x7fffffff) % 3 + 1; //vy
break;
case BULLET_TYPE_BOTTOM:
bullets[i][1] = (rnd.nextInt() & 0x7fffffff) % width;
bullets[i][2] = height + 5;
bullets[i][3] = (rnd.nextInt()) % 3; //vx
bullets[i][4] = ( (rnd.nextInt() & 0x7fffffff) % 3 + 1) * -1; //vy
break;
}
}

public void updata(int i){
bullets[i][1]+=bullets[i][3];
bullets[i][2]+=bullets[i][4];
if(bullets[i][1]<-5 || bullets[i][1]>width+5){
bullets[i][3]*=-1;
}
if(bullets[i][2]<-5 || bullets[i][2]>height+5){
bullets[i][4]*=-1;
}
}

private void paint(Graphics g,int i){
updataspritepos(i);
sprite.paint(g);
}

public void paint(Graphics g) {
for (int i = 0; i < bullets.length; i++) {
if(bullets[i][5]==0){
continue;
}
sprite.setPosition(bullets[i][1],bullets[i][2]);
sprite.paint(g);
}
}

public void refreshBullets(Sprite planesprite, boolean needcollision){
for (int i = 0; i < bullets.length; i++) {
if(bullets[i][5]==0){
continue;
}
if(needcollision){
//System.out.println("needcollision ");
if (isCollision(planesprite, i, 10)) {
//System.out.println("collision ");
Navigate.mc.gameover = true;
Navigate.mc.explosion.sprite.setPosition(bullets[i][1] - 16,
bullets[i][2] - 16);
bullets[i][5] = 0;
continue;
}
}
updata(i);
}
}

private boolean isCollision(Sprite sprite,int i,int range){
//updataspritepos(i);
//return sprite.collidesWith(this.sprite,true);
boolean result=false;
int planeXCenter=sprite.getX()+12;
int planeYCenter=sprite.getY()+12;
int bulletXCenter=bullets[i][1]+3;
int bulletYCenter=bullets[i][2]+3;
if(Math.abs(planeXCenter-bulletXCenter) < range){
if (Math.abs(planeYCenter - bulletYCenter )< range) {
result = true;
}
}
return result;
}

private void updataspritepos(int i){
sprite.setPosition(bullets[i][1],bullets[i][2]);
}