bullet.java

JVAV手机游戏单机版 连连看

import javax.microedition.lcdui.game.*;
import javax.microedition.lcdui.*;
import java.util.Random;
public class Bullet extends Sprite
{

    private int frameWidth, frameHeight;
    private int CanvasWidth, CanvasHeight;
    private boolean isAlive = false;
    public Bullet(Image image, int frameWidth, int frameHeight)
    {
        super(image, frameWidth, frameHeight);
        this.frameWidth = frameWidth;
        this.frameHeight = frameHeight;
        defineReferencePixel(frameWidth / 2, frameHeight / 2);
    }
    public void setCanvasSize(int CanvasWidth, int CanvasHeight)
    {
        this.CanvasWidth = CanvasWidth;
        this.CanvasHeight = CanvasHeight;
    }
    public void setAlive(int x, int y)
    {
    	  setPosition(x,y);
    	  isAlive = true;

    }
    public void setAlive(boolean isAlive)
    {
    	
    	  this.isAlive = isAlive;

    }
    public boolean isAlive(){
        return isAlive;
    }
    public void tick()
    {

    	if(isAlive)move(0,-3);
      if(getY()<0)isAlive = false;
    }

    public void draw(Graphics g)
    {
        if (isAlive){
            paint(g);
          }
    }

}