gamestart.java

J2ME手机游戏,可以下下玩完,很好玩的.

package Src;
/*
 * 精灵类开始运行
 */
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;
 

public class Gamestart extends GameCanvas implements Runnable {
 private boolean isPlay;//是否开始 
 private long delay;  //延迟时间  
 private Plane plane;
 private Bullets bullets;
 private Image Planeimg,bulletimg,backgroudimg;
 private int width,heigh;
 private int planex,planey;//飞机x,y坐标
 private int Gamedef;//游戏难度
 
 //定义缓冲区
 private Image buffer;


 private FugitiveGame midlet;
 private int back;
  
 
 public Gamestart(int def,FugitiveGame midlet) {
 
     super(true);
     super.setFullScreenMode(true);
     delay =50;
	    try{
 		Planeimg=Image.createImage("/res/Plane.png");
 		bulletimg=Image.createImage("/res/bullet.png");
 		backgroudimg=Image.createImage("/res/GameBack.png");
 	}catch(Exception e){}
 	 width=this.getWidth();
 	 heigh=this.getHeight();
 	 
 	 this.midlet=midlet;
 	 back=1;
 	 
 	 //缓冲区
 	 buffer=Image.createImage(this.getWidth(),this.getHeight());
 	 //资源加载
     plane=new Plane(Planeimg,30,40);
     bullets=new Bullets(bulletimg,5,5);
     this.Gamedef=def;
     plane.Planeinto(width,heigh);
     bullets.intonum(15,width,heigh);
     this.paintBuffer();
    
 }

 private void paintBuffer()//画缓冲区
 {
	 
	
	 Graphics g=buffer.getGraphics();
	
	 g.drawImage(this.backgroudimg, 0, 0,g.TOP|g.LEFT);
     plane.DrawPlane(g);//绘制飞机
     bullets.draw(g);//绘制子弹
	  
 }
 public void start() {
 
     isPlay = true;
     new Thread(this).start();
 }

 public void stop() { isPlay = false; }

 
 public void run() {
     Graphics g = getGraphics();
    
     long newtime;
     int alltime=0;//记录延迟时间，然后计算存活时间 
     while (isPlay) {
    	 alltime+=(int)delay;
    	 newtime=System.currentTimeMillis();
    	 
         this.drawScreen(g);
         g.setColor(0xffffff);
         flushGraphics();
         if (bullets.collidesWith(plane))
         {   
        	 this.midlet.Gametime=alltime;
        	 this.midlet.GameStop();
       	     isPlay=false;
         }
         Planeinput();
        bullets.fly();
         this.paintBuffer();
         newtime=System.currentTimeMillis()-newtime;
         try{
             if (newtime<this.delay)
    			{
    				Thread.currentThread().sleep(delay-newtime);
    			}
            }
         catch (InterruptedException ie) {}
     }
   
 }
 private void Planeinput() {
     int keyStates = getKeyStates();
     if ((keyStates & LEFT_PRESSED) != 0)
     {
     	 planex=plane.GetPosionx();
     	 plane.setPosionx(Math.max(30,planex-1));
     }
     if ((keyStates & RIGHT_PRESSED) !=0 )
     {
    	 planex=plane.GetPosionx();
 	     plane.setPosionx(Math.min(width,planex+1));
     }
     
     if ((keyStates & UP_PRESSED) != 0)
     {
    	 planey=plane.GetPosiony();
	     plane.setPosiony(Math.max(40,planey-1));
     }
     if ((keyStates & DOWN_PRESSED) !=0)
     {
    	 planey=plane.GetPosiony();
         plane.setPosiony(Math.min(heigh,planey+1));
     }
   
 }
 
  
 private void drawScreen(Graphics g) {
 		 
	
     g.drawImage(this.buffer, 0, 0,g.TOP|g.LEFT);
 
     
}
 
}