mycanvas.java

J2ME的游戏原代码!希望能帮助有需要帮助的师兄弟们！

 //colorbugsCanvas

import javax.microedition.lcdui.*;
import java.util.Random;

public class MyCanvas extends Canvas{
	totathread mythread;
	private fish balls[]; //fish objlist
	private area areas[];
	private int targArea = 4;
	private int center_x = getWidth() / 2;	
	private int center_y = getHeight() / 2;
	private int scWidth = getWidth();
	private int scHeight = getHeight();
	private int gx = center_x *100; //target x
	private int gy = center_y *100; //target y
	private Random rnd =new Random();

	boolean onoff = true;
	
	//constructor
	MyCanvas() {
		// making thread obj
		mythread = new totathread(this);
		makeObjects();
		mythread.start();
		
	}
	
	protected void showNotify(){
		onoff = true;
	}

	protected void hideNotify(){
		onoff = false;
	}
	
	public void makeObjects() { 
	
		balls = new fish[12]; // numbers of bugs
		
		for(int i = 0; i < balls.length; i++) {
			int tempx =Math.abs(rnd.nextInt()%(scWidth-20));
			int tempy =Math.abs(rnd.nextInt()%(scHeight-20));
			int tempvx =Math.abs(rnd.nextInt()%(3))-1;
			int tempvy =Math.abs(rnd.nextInt()%(3))-1;
			balls[i] = new fish(tempx,tempy,tempvx,tempvy);
		}

		areas = new area[9];
		areas[0] = new area(scWidth/4 *100,scHeight/4 *100,255,0,0);
		areas[1] = new area(scWidth/4 *100 *2 ,scHeight/4 *100,255,125,225);
		areas[2] = new area(scWidth/4 *100 *3 ,scHeight/4 *100,125,0,255);
		areas[3] = new area(scWidth/4 *100,scHeight/4 *100*2,0,0,255);
		areas[4] = new area(scWidth/4 *100*2,scHeight/4 *100*2,0,255,255);
		areas[5] = new area(scWidth/4 *100*3,scHeight/4 *100*2,0,255,125);
		areas[6] = new area(scWidth/4 *100,scHeight/4 *100*3,0,255,0);
		areas[7] = new area(scWidth/4 *100*2,scHeight/4 *100*3,255,255,0);
		areas[8] = new area(scWidth/4 *100*3,scHeight/4 *100*3,255,125,0);
	chnageArea(); 

	}

	public void updatestage(){
		if (onoff){
		move();
		repaint();
		}		
	}
	////move
    	public void move(){

		for (int i = 0; i < balls.length;i++) {
			balls[i].nvx =  (gx - balls[i].x) /50;
			balls[i].nvy =  (gy - balls[i].y) /50;
		
			//speedup
			if ((balls[i].vx < 12 || balls[i].vy < -12) && (balls[i].vy < 12 || balls[i].vy < -12)) {
				balls[i].vx = (balls[i].vx/10)* (11+Math.abs(rnd.nextInt()%(5)));
				balls[i].vy = (balls[i].vy/10)* (11+Math.abs(rnd.nextInt()%(5)));
			}
			//slowdown
			if (balls[i].vx > 100 || balls[i].vx < -100 || balls[i].vy > 100 || balls[i].vy < -100) {
				balls[i].vx = (balls[i].vx/10)* 8;
				balls[i].vy = (balls[i].vy/10)* 8;
			}


			if (dist(i)< 25000) {
				balls[i].r =	balls[i].r +( areas[targArea].r - balls[i].r)/10;
				balls[i].g = 	balls[i].g +( areas[targArea].g - balls[i].g)/10;
				balls[i].b = 	balls[i].b +( areas[targArea].b - balls[i].b)/10;
			}
		
			balls[i].vx += balls[i].nvx;
			balls[i].vy += balls[i].nvy;

			balls[i].x += balls[i].vx;
			balls[i].y += balls[i].vy;		
		}
	
	}	

	//distance
	public int dist(int i) {
		return (balls[i].x-gx) * (balls[i].x-gx) + (balls[i].y-gy) * (balls[i].y-gy);
	}

	public void chnageArea(){
	      for(int i = 0; i < areas.length;i++){
            if (i == targArea){
				areas[i].setmorph(1600);
			}else{
	         	areas[i].setmorph(400);
			}
		  }
    	
	}
	// draw
	public void paint(Graphics g) {
		g.setColor(0,0,0);
		g.fillRect(0, 0, scWidth, scHeight);

		for(int i = 0; i < areas.length;i++){    //偙偙偱area 僋儔僗傪draw丅
			areas[i].update();
			int xx = (areas[i].x/100);
			int yy = (areas[i].y/100);

		//	if (i == targArea){
			g.setColor(areas[i].r,areas[i].g,areas[i].b);	
            int tempw = areas[i].w/100;
			g.drawRect(xx-(tempw/2),yy-(tempw/2),tempw,tempw);
		//	}else{
		//		g.setColor(areas[i].dr,areas[i].dg ,areas[i].db);
		//		g.drawRect(xx-2,yy-2,4,4);
		//	}
			    
			
		}

		

		for(int i = 0; i < balls.length;i++){    //偙偙偱fish 僋儔僗傪draw丅
			g.setColor(balls[i].r,balls[i].g,balls[i].b);
			int xx = (balls[i].x/100);
			int yy = (balls[i].y/100);
			g.fillRect(xx-1,yy-1,2,2);
			g.drawLine(xx, yy,(xx + balls[i].vx/100), (yy + balls[i].vy/100));
		}
       			
			
	}

	public void keyPressed(int keyCode){
		
		
		switch(keyCode){
			case KEY_NUM1:	gy = areas[0].y;
					gx = areas[0].x;
					targArea = 0;
					chnageArea(); 
					break;
			case KEY_NUM2:	gy = areas[1].y;
					gx = areas[1].x;
					targArea = 1;
					chnageArea(); 
					break;
			case KEY_NUM3:	gy = areas[2].y;
					gx = areas[2].x;
					targArea = 2;
					chnageArea(); 
					break;
			case KEY_NUM4:	gy = areas[3].y;
					gx = areas[3].x;
					targArea = 3; 
					chnageArea();
					break;
			case KEY_NUM5:	gy = areas[4].y;
					gx = areas[4].x; 
					targArea = 4;
					chnageArea();
					break;
			case KEY_NUM6:	gy = areas[5].y;
					gx = areas[5].x;
					targArea = 5;
					chnageArea(); 
					break; 
			case KEY_NUM7:	gy = areas[6].y;
 					gx = areas[6].x;
					targArea = 6;
					chnageArea();
					break; 
			case KEY_NUM8:	gy = areas[7].y;
 					gx = areas[7].x;
					targArea = 7;
					chnageArea();
					break; 
			case KEY_NUM9:	gy = areas[8].y;
					gx = areas[8].x;
					targArea = 8;
					chnageArea();  
					break; 
		}

		
        repaint();
	}
	
}