plane.java

游戏学院学过的一个J2ME代码实例的整理

package npc7776;

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;

public class Plane {
  Image img;
  int x , y;
  int frameX, frameY;
  int scnX , scnY;
  Sprite plane;
  int Move = 3;
  boolean b = true;
  public Plane(Image imgs,int fX,int fY,int sX,int sY) {
    scnX = sX;        //屏幕宽
    scnY = sY;        //屏幕高
    frameX = fX;       //桢数
    frameY = fY;
    img = imgs;
    x = y = sX /2 ;
    plane = new Sprite(img,frameX,frameY);// 构造plane
  }
  // 画飞机
  public void drawSelf(Graphics g){

    if (b == true){
      plane.setPosition(x,y) ;
      plane.paint(g) ;
      b = false;
    }else
      plane.paint(g) ;

  }

  public void hf(){
  plane.setFrame(0);}
//移动左方法
  public void moveLeft(){
    getXY();
    plane.setFrame(1) ;
    if (x - Move > 0){
      plane.move(-Move,0) ;

    }
  }
  public void moveRight(){
    getXY();
     plane.setFrame(2) ;
    if (x + Move + frameX < scnX){
      plane.move(Move,0) ;

    }
  }
  public void moveUp(){
    getXY();
     plane.setFrame(0) ;
    if (y - Move >0){
      plane.move(0,-Move) ;

    }
  }
  public void moveDown(){
    getXY();
     plane.setFrame(0) ;
    if (y+frameY+Move < scnY){
      plane.move(0,Move) ;

    }
  }
  //获得飞机 X,Y 点
  public void getXY(){
    x = plane.getX() ;
    y = plane.getY() ;
  }
}