gamecanvas.java

手机游戏 公路汽车蔽障类游戏 用eclips开发 运用applet技术 程序用java类开发工具打开即可运行调试

package com.supinfo.cargame;

import java.util.Random;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;


public class GameCanvas extends Canvas {
	
	private int width=getWidth();
	private int height=getHeight();
	private int liney=0;
	private int linesize=25;
	private int roadx=(int) (width*0.3);
	private int roadw=width-2*roadx;
	private int carx=(int) (width*0.5);
	private int cary=height-40;

	private int carcol;
	private int carspeed=10;

	private	int n1=liney;
	private	int n2=liney+linesize*2;
	private	int n3=liney+linesize*4;
	private	int n4=liney+linesize*6;
	private	int n5=liney+linesize*8;
	private	int n6=liney+linesize*10;
	private	int n7=liney+linesize*12;
	private	int n8=liney+linesize*14;
	
	private int ballSize=40;
	private int ballX= new Random().nextInt(width-2*roadx - ballSize) + roadx;
	private int ballY=linesize;
	
	private int score=0;
	
	

	public GameCanvas(int carcol) {
		this.carcol=carcol;
	
		
		switch (carcol) {
		case 0:
            this.carcol=0xff0000;
			break;
		case 1:
            this.carcol=0x00ff00;
			break;
		case 2:
            this.carcol=0x0000ff;
			break;
		case 3:
            this.carcol=0xffff00;
			break;
		case 4:
            this.carcol=0x000000;
			break;
		default:
			break;
		}

	}
		
	protected void paint(Graphics g) {
		
		
		//the back ground
		g.setColor(0, 150, 150);
		g.fillRect(0, 0, width,height);
			
		//the  green lines
		
	    g.setColor(0, 255, 0);
	    g.fillRect(0, n1, width, linesize);				
	    g.setColor(0, 255, 0);
		g.fillRect(0, n2, width, linesize);			
		g.setColor(0, 255, 0);
		g.fillRect(0, n3, width, linesize);				
		g.setColor(0, 255, 0);
		g.fillRect(0, n4, width, linesize);				
		g.setColor(0, 255, 0);
		g.fillRect(0, n5, width, linesize);				
		g.setColor(0, 255, 0);
		g.fillRect(0, n6, width, linesize);			
		g.setColor(0, 255, 0);
		g.fillRect(0, n7, width, linesize);				
		g.setColor(0, 255, 0);
		g.fillRect(0, n8, width, linesize);	
		
		
		
		//the road
		g.setColor(255,255,255);
		g.fillRect(roadx, 0, roadw, height);
		
		//the ball
		g.setColor(0,0,0);
		g.fillRect(ballX, ballY, ballSize, ballSize);
			
		//the car
		g.setColor(carcol);
		g.fillRect(carx, cary, 20, 40);
		
		//the top
		g.setColor(207,207,207);
		g.fillRect(0, 0, width, linesize);
		
		//the words
		g.setColor(0,0,0);
		g.drawString("Score: " + score ,0, 0, Graphics.LEFT|Graphics.TOP);
		
		g.setColor(255,255,0);
		g.drawString("Escape Collisions GoGoGo.... ",roadx, 0, Graphics.LEFT|Graphics.TOP);
					
	}
	
	
	
    protected void keyPressed(int keyCode) {
		
		if(getGameAction(keyCode) == RIGHT)
		{
			if(carx+20 >= roadx+roadw)
			{
				carx = roadx+roadw-20;
			}
			else
				carx += carspeed;
		}
		if(getGameAction(keyCode) == LEFT)
		{
			if(carx <= roadx)
			{
				carx = roadx;
			}
			else
				carx -= carspeed;
		}
		
		if(getGameAction(keyCode) == UP)
		{
			if(cary <= linesize)
			{
				cary=linesize;
			}
			else
				cary -= carspeed;
		}
		if(getGameAction(keyCode) == DOWN)
		{
			if(cary+40 >= height)
			{
				cary = height-40;
			}
			else
				cary += carspeed;
		}
		repaint();

}
	
    protected void keyRepeated(int keyCode) {
		
		if(getGameAction(keyCode) == RIGHT)
		{
			if(carx+20 >= roadx+roadw)
			{
				carx = roadx+roadw-20;
			}
			else
				carx += carspeed;
		}
		if(getGameAction(keyCode) == LEFT)
		{
			if(carx <= roadx)
			{
				carx = roadx;
			}
			else
				carx -= carspeed;
		}
		
		if(getGameAction(keyCode) == UP)
		{
			if(cary <= linesize)
			{
				cary=linesize;
			}
			else
				cary -= carspeed;
		}
		if(getGameAction(keyCode) == DOWN)
		{
			if(cary+40 >= height)
			{
				cary = height-40;
			}
			else
				cary += carspeed;
		}
		repaint();

}

    
    public void moveback() {
	
	if (n1>=height) {	n1=0;	} else {  n1+=5; }
	if (n2>=height) {	n2=0;	} else {  n2+=5; }
	if (n3>=height) {	n3=0;	} else {  n3+=5; }
	if (n4>=height) {	n4=0;	} else {  n4+=5; }
	if (n5>=height) {	n5=0;	} else {  n5+=5; }
	if (n6>=height) {	n6=0;	} else {  n6+=5; }
	if (n7>=height) {	n7=0;	} else {  n7+=5; }
	if (n8>=height) {	n8=0;	} else {  n8+=5; }
	

		if(ballY >= height)
		{						
				score += 4;
				
				ballY = 0;
				ballX = new Random().nextInt(width-2*roadx - ballSize) + roadx;						
		}
		else

	          ballY += 5;
	    
		if (ballY+ballSize>=cary&&carx < ballX+ballSize && carx > ballX-20) {
						
		score -= 2;
		
		ballY = 0;
		ballX = new Random().nextInt(width-2*roadx - ballSize) + roadx;
		
	}
		

		repaint();
	}

	

}