bullet.java

来自「Java j2me写的一款手机飞行游戏」· Java 代码 · 共 36 行

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
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public class Bullet extends Sprite implements IData {
	int mDir;
	int mX,mY;
	int mSpeed=5;

	public Bullet(Image image, int frameWidth, int frameHeight) {
		super(image, frameWidth, frameHeight);
	}
	public void setBullet(int x,int y,int dir){
		mX=x-getWidth()/2; mY=y-getHeight()/2; mDir=dir;
		setPosition(mX,mY);
	}
	
	public void action(){
		switch(mDir){
			case UP:
				move(0,-mSpeed);
				break;
			case DOWN:
				move(0,mSpeed);
				break;
			case RIGHT:
				move(mSpeed,0);
				break;
			case LEFT:
				move(-mSpeed,0);
				break;
		}
	}

}