spritegame.java

j2me实例代码

package game;

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

public class SpriteGame extends GameCanvas implements Runnable {
	private LayerManager lm;
	private Sprite c1;
	private Sprite c2;
	public SpriteGame(){
		super(true);
		lm=new LayerManager();
		c1=this.CreateFrames("/game/frames.png");
		c2=this.CreateFrames("/game/frames.png");
		int seq[]=new int[]{0,0,1,1,1,2,2,1,1};
		c1.setFrameSequence(seq);
		c2.setFrameSequence(seq);
		c2.setPosition(48,48);
		lm.append(c1);
		lm.append(c2);
		
	}
	private Sprite CreateFrames(String picurl){
		Image img=null;
		try{
			img=Image.createImage(picurl);
		}catch(Exception e){
			System.out.println(e);
		}
		return new Sprite(img,32,14);
	}
	boolean flag=true;
	int rate=100;
	
	public void run() {
		long st=0;
		long et=0;
		Graphics g=getGraphics();
		while(flag){
			st=System.currentTimeMillis();
			input();
			if(c1.collidesWith(c2,true)){
				int s[]=new int[]{3};
				c1.setFrameSequence(s);
				c2.setFrameSequence(s);
				render(g);
				break;
			}
			render(g);
			et=System.currentTimeMillis();
			if((et-st)<rate){
				try{
					Thread.sleep(rate-(et-st));
				}catch(Exception e){}
			}
		}
		
	}
	int x=0;
	int y=0;
	public void input(){
		int keystate=this.getKeyStates();
		if((keystate & UP_PRESSED)!=0){
			c1.move(x,-2);
			if(c1.getY()<=0){
				c1.setPosition(c1.getX(),0);
			}
		}else if((keystate & DOWN_PRESSED)!=0){
			c1.move(x,2);
			if(c1.getY()>(128-c1.getHeight())){
				c1.setPosition(c1.getX(),(128-c1.getHeight()));
			}
		}else if((keystate & LEFT_PRESSED)!=0){
			c1.move(-2,0);
			if(c1.getX()<=0){
				c1.setPosition(0,c1.getY());
			}
		}else if((keystate & RIGHT_PRESSED)!=0){
			c1.move(2,0);
			if(c1.getX()>(128-c1.getWidth())){
				c1.setPosition((128-c1.getWidth()),c1.getY());
			}
		}
		
	}
	
	public void render(Graphics g){
		g.setColor(255,255,255);
		g.fillRect(0,0,getWidth(),getHeight());
		c1.nextFrame();
		c2.nextFrame();
		lm.setViewWindow(0,0,this.getWidth(),this.getHeight());
		lm.paint(g,10,10);
		g.setColor(0,0,0);
		g.drawRect(10,10,128,128);
		flushGraphics();
	}
	
	public void start(){
		Thread t=new Thread(this);
		t.start();
	}
	
	public void exit(){
		flag=false;
	}
	
}