prop.java

Java自己做的小游戏

import java.util.Random;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
public class prop //道具类
{
	Random Rd=new Random();//产生随机数
	Image propImg=null;
	int propNum=6;//道具数量
	int which=4;//哪个道具 //0:增加球移动速度 1：减慢球移动速度 2：增加挡板长度 3：减小挡板长度 4：火焰球 5:生命
	int propW=10;//道具宽
	int propH=10;//道具高
	int speed=2;
	int propX=0;
	int propY=0;
	int rd=0;//随机数
	prop(brick Brick) 
	{
		rd=Rd.nextInt(100);
		try
		{
			propImg=Image.createImage("/propImg.png");
		}
		catch(Exception e)
		{
			System.out.println("prop 道具类图片错误");
			e.printStackTrace();
		}
		speed=Rd.nextInt(3)+1;
		if(rd>=0&&rd<=10)
		{
			which=5;
		}
		else if(rd>10&&rd<=20)
		{
			which=1;
		}
		else if(rd>20&&rd<=30)
		{
			which=2;
		}
		else if(rd>30&&rd<=40)
		{
			which=4;
		}
		else if(rd>40&&rd<=70)
		{
			which=0;
		}
		else
		{
			which=3;
		}
		propX=Brick.brickX+(Brick.brickW-propW)/2-which*propW;
		propY=Brick.brickY;
	}
	public void paint(Graphics g)
	{
		g.setClip(propX+which*propW, propY, propW, propH);
		g.drawImage(propImg, propX, propY, 0);
	}
	public void move(player p)
	{
		propY+=speed;
		if(propX+which*propW>p.playerX-propW&&propX+which*propW<p.playerX+p.playerImg.getWidth()&&propY+propImg.getHeight()>p.playerY)
		{
			result();
			propY+=100;
		}
	}
	public void result()//效果
	{
		switch(which)
		{
		case 0://0:增加球移动速度
			if(ball.xSpeed<5)
			{
				ball.xSpeed+=ball.xSpeed/Math.abs(ball.xSpeed);
				ball.ySpeed+=ball.ySpeed/Math.abs(ball.ySpeed);
			}
			break;
		case 1://1：减慢球移动速度
			if(ball.ySpeed>1)
			{
				ball.xSpeed-=ball.xSpeed/Math.abs(ball.xSpeed);
				ball.ySpeed-=ball.ySpeed/Math.abs(ball.ySpeed);
			}
			break;
		case 2://2：增加挡板长度等级
			if(player.playerLv<3)
				player.playerLv++;
			break;
		case 3:// 3：减小挡板长度等级
			if(player.playerLv>1)
				player.playerLv--;
			break;
		case 4:// 4：火焰球
			ball.which=2;
			break;
		case 5://生命
			if(player.life<9)
			player.life++;
			else player.fraction+=66;
			break;
		}
	}
	public void recycleRes() 
	{
		propImg=null;
	}
}