snakecanvas.java

j2me快乐蛇0.2版代码,内有经典版贪食蛇和新版

import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.Canvas;
import java.util.Vector;
import java.util.Random;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import java.lang.Thread;
import javax.microedition.media.Player;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import java.io.IOException;
import java.io.InputStream;
public class SnakeCanvas extends GameCanvas implements Runnable{
	private mmenuCanvas parent;
	private Vector snake;
	private POINT food;
	private int score,lv;
	private int dir,sel;
	private Random rnd;
	private Graphics g;
	private boolean pauseReq,alive;
	private GameOpt option=null;
	private Player player=null;
	public SnakeCanvas(mmenuCanvas p,GameOpt go) {
		super(true);
		option=go;
		parent=p;
		this.setFullScreenMode(true);
		score=0;
		lv=0;
		rnd=new Random(System.currentTimeMillis());
		snake=new Vector();
		snake.addElement(new POINT(7,22));
		snake.addElement(new POINT(6,22));
		snake.addElement(new POINT(5,22));
		dir=RIGHT;
		pauseReq=false;
		g=getGraphics();
		food=new POINT();
		try {
     		InputStream is=getClass().getResourceAsStream("eat1.wav");
     		player= Manager.createPlayer(is,null);
     		player.realize();
     		//player.start();
 		} catch (MediaException pe) {
 			System.out.println(pe.getMessage());
 		} catch (IOException ioe) {
 			System.out.println(ioe.getMessage());
 		}

	}

	public void run() {
		boolean k1,k2;
		int i;
		alive=true;
		POINT tp=new POINT();;
		long time,lastFlush=0;
		int key,nextDir;
		genFood();
		g.setColor(0xfffffff);
		g.fillRect(0,0,128,160);
		g.setColor(0);
		g.fillRect(2,3,124,139);
		g.fillTriangle(118,152,125,152,121,159);
		g.drawChar('0',21,142,g.TOP|g.LEFT);
		g.setColor(0xfffffff);
		g.fillRect(4,5,120,135);
		nextDir=RIGHT;
		while(true){
			if(pauseReq){
				k1=false;
				sel=0;
				g.setColor(0xffffff);
				g.fillRect(20,20,90,48);
				g.setColor(0);
				g.drawRect(20,20,90,48);
				g.drawString("***PAUSE***",21,20,g.TOP|g.LEFT);
				g.drawString("     Back",20,36,g.TOP|g.LEFT);
				g.drawString("     Quit",20,52,g.TOP|g.LEFT);
				if(sel==0) g.drawChar('>',27,36,g.TOP|g.LEFT);
				else g.drawChar('>',27,52,g.TOP|g.LEFT);
				this.flushGraphics();
				while(pauseReq){
					key=getKeyStates();
					k2=(key&UP_PRESSED)!=0||(key&DOWN_PRESSED)!=0;
					if(k1==true&&!k2){
						k1=false;
						g.setColor(0xffffff);
						g.fillRect(20,20,90,48);
						g.setColor(0);
						g.drawRect(20,20,90,48);
						g.drawString("***PAUSE***",21,20,g.TOP|g.LEFT);
						sel=1-sel;
						g.drawString("     Back",20,36,g.TOP|g.LEFT);
						g.drawString("     Quit",20,52,g.TOP|g.LEFT);
						if(sel==0) g.drawChar('>',27,36,g.TOP|g.LEFT);
						else g.drawChar('>',27,52,g.TOP|g.LEFT);
						this.flushGraphics();
					}else if(k2) k1=true;
					if((key&FIRE_PRESSED)!=0){
						if(sel==0) pauseReq=false;
						else{
							player.close();
							player=null;
							parent.backToMenu();
							return;
						}
					}
				}
				lastFlush=0;
				System.gc();
				try{
					player.start();
				}catch(MediaException me){}
			}
			key=getKeyStates();
			if((key&UP_PRESSED)!=0){
				if(dir!=DOWN) nextDir=UP;
			}else if((key&DOWN_PRESSED)!=0){
				if(dir!=UP) nextDir=DOWN;
			}else if((key&LEFT_PRESSED)!=0){
				if(dir!=RIGHT) nextDir=LEFT;
			}else if((key&RIGHT_PRESSED)!=0){
				if(dir!=LEFT) nextDir=RIGHT;
			}
			if((key&FIRE_PRESSED)!=0)lastFlush-=1;
			time=System.currentTimeMillis();
			if((time-lastFlush)>1500/(lv+4)){
				lastFlush=time;	
				dir=nextDir;
				tp.setPoint(((POINT)snake.firstElement()).x,((POINT)snake.firstElement()).y);
				switch(dir){
				case UP:	
					tp.y-=1;
					break;
				case DOWN:
					tp.y+=1;
					break;
				case LEFT:
					tp.x-=1;
					break;
				case RIGHT:
					tp.x+=1;
					break;
				}
				if(tp.x==-1||tp.y==-1||tp.x==40||tp.y==45){
					alive=false;
				}
				for(i=4;i<snake.size();i++){
					if(POINT.samePoint((POINT)snake.elementAt(i),tp)) alive=false;
				}
				if(!alive){
					g.setColor(0xffffff);
					g.fillRect(30,30,90,20);
					g.setColor(0);
					g.drawRect(30,30,90,20);
					g.drawString("You Lose!",35,32,g.TOP|g.LEFT);
					this.flushGraphics();
					while(true){
						key=getKeyStates();
						if((key&FIRE_PRESSED)!=0) {
							player.close();
							player=null;
							parent.backToMenu();
							return;
						}
					}
				}
				if(POINT.samePoint(tp,food)){
					genFood();
					snake.addElement(new POINT());
					if(snake.size()%5==0) lv++;
					g.setColor(0xffffff);
					g.fillRect(20,142,50,16);
					g.setColor(0);
					g.drawString(Integer.toString(snake.size()-3),21,142,g.TOP|g.LEFT);
					if(option.sound){	
						try{
							//player.setLoopCount(-1);
							player.start();
						}catch(Exception me){}
					}
				}
				g.setColor(0xffffff);
				g.fillRect(4,5,120,135);
				g.setColor(0);
				g.fillRect(4+3*food.x,5+3*food.y,3,3);
				g.fillArc(4+3*tp.x,5+3*tp.y,3,3,0,360);
				for(i=snake.size()-1;i>0;i--){
					((POINT)snake.elementAt(i)).setPoint(((POINT)snake.elementAt(i-1)).x,((POINT)snake.elementAt(i-1)).y);					
					g.fillArc(4+3*((POINT)snake.elementAt(i)).x,5+3*((POINT)(snake.elementAt(i))).y,3,3,0,360);
	//			System.out.println("snake["+i+"].x="+((POINT)snake.elementAt(i)).x+" y="+((POINT)snake.elementAt(i)).y);
	//			System.out.println("free memory: "+Runtime.getRuntime().freeMemory());
				}
				((POINT)snake.firstElement()).setPoint(tp.x,tp.y);	
				this.flushGraphics();
			}
		}	
	}
	private void genFood(){
		boolean j=false;
		while(true){
			food.setPoint(Math.abs(rnd.nextInt()%40),Math.abs(rnd.nextInt()%45));
			for(int i=0;i<snake.size();i++){
				if(POINT.samePoint(food,(POINT)snake.elementAt(i))){ j=true; break;}
			}
			if(!j) {
				System.out.println("food:("+food.x+","+food.y+")");
				return;
			}
			j=false;
		}
	}	
	public void keyReleased(int keyCode){
		System.out.println(keyCode);
			if(keyCode==-22||keyCode==-7) pauseReq=!pauseReq;
	}
}