bullet.java

来自「一款益智类的手机游戏」· Java 代码 · 共 70 行

package twplanegame;

import javax.microedition.lcdui.*;

class Bullet
    extends PlaneGameObject
{
    private int XSpeed;
    private int YSpeed;

    //constructor
    public Bullet(int id)
    {
        super(id, 0, 0);
        switch (id) {
            case 0: //my bullet
                try {
                    ObjImage = Image.createImage("/MyBullet01.PNG");
                }
                catch (Exception e) {
                    ObjImage = null;
                }
                XSpeed = 10;
                YSpeed = 0;
                break;
            case 1: //enemy plane bullet
                try {
                    ObjImage = Image.createImage("/EnemyBullet01.PNG");
                }
                catch (Exception e) {
                    ObjImage = null;
                }
                XSpeed = 3;
                YSpeed = 3;
                break;
            case 2:
                try {
                    ObjImage = Image.createImage("/BossBullet01.PNG");
                }
                catch (Exception e) {
                    ObjImage = null;
                }
                XSpeed = 2;
                YSpeed = 2;
                break;
        }
        int width = ObjImage.getWidth();
        int height = ObjImage.getHeight();
        int radius = width < height ? width : height;
        SetImageSize(width, height, radius);
    }

    public void SetSpeed(int x, int y)
    {
        XSpeed = x;
        YSpeed = y;
    }

    public int GetXSpeed()
    {
        return XSpeed;
    }

    public int GetYSpeed()
    {
        return YSpeed;
    }

}