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 bub balls[]; //bub objlist
	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 bub[16]; // 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 bub(center_x,scHeight +10,tempvx,tempvy);

		}




	}

	public void updatestage(){
		if (onoff){
			move();
			repaint();
		}
	}
	///birth
	public void birth(){
		int yseed;
		for(int i = 0; i < balls.length;i++){
			if (balls[i].moveFlag ==0){
				balls[i].moveFlag =1;
				balls[i].ox = gx;
				balls[i].oy = gy;
				balls[i].x = gx ;
				balls[i].y = gy +i*50;
				yseed = Math.abs(rnd.nextInt()%(500));
				balls[i].vy =(yseed + 100)/5;
				balls[i].vx =(Math.abs(rnd.nextInt()%(500)));
				balls[i].size =(yseed + 100)/200;
				balls[i].r =Math.abs(rnd.nextInt()%(50));

			}
		}
	}
	////move
    	public void move(){

		for (int i = 0; i < balls.length;i++) {
			if (balls[i].moveFlag == 1){
				if (balls[i].vx > 0){
					if(balls[i].x- balls[i].ox > balls[i].size*300){
					//	balls[i].vx = 0 - balls[i].vx;
					balls[i].vx = -100;
					}
				}else{
					if(balls[i].ox- balls[i].x > balls[i].size*300){
					//	balls[i].vx = 0 - balls[i].vx;
					balls[i].vx = 100;
					}

				}

				if (balls[i].y < 0){
					balls[i].x = center_x*100;
					balls[i].y = scHeight*100;
					balls[i].moveFlag = 0;
				}else{
					balls[i].x += balls[i].vx;
					balls[i].y -= balls[i].vy;
				}
			}
		}

	}


	// draw
	public void paint(Graphics g) {
		int tempcol;
		g.setColor(0,0,255);
		g.fillRect(0, 0, scWidth, scHeight);
		g.setColor(255,255,255);
		g.drawLine(gx/100 -2,gy/100,gx/100 +2,gy/100);
		g.drawLine(gx/100 ,gy/100-2,gx/100,gy/100+2);
		for(int i = 0; i < balls.length;i++){
			tempcol =balls[i].r + 50;
			    //偙偙偱bub 僋儔僗傪draw丅
			g.setColor(255,255,255);

			int xx = (balls[i].x/100);
			int yy = (balls[i].y/100);
			g.drawRect(xx,yy,balls[i].size,balls[i].size);
		//	g.drawLine(xx, yy,(xx + balls[i].vx/100), (yy + balls[i].vy/100));
		}


	}

	public void keyPressed(int keyCode){

		int action = getGameAction(keyCode);
		switch(action){
			case LEFT:
			if (gx < 0){
				gx = scWidth*100;
			}else{
			gx -= 500;}
			break;
			case RIGHT:
			if (gx > scWidth*100){
				gx = 0;
			}else{
			 gx += 500;
			}
			 break;
            		case UP:
			if (gy < 0){
				gy = scHeight *100;
			}else{
			 gy -= 500;
			}
			break;
			case DOWN:
			if (gy > scHeight*100){
				gy = 0;
			}else{
			 	gy += 500;
			}
			 break;
			case FIRE: birth();


		}


        repaint();
	}

}