timercanvas.txt

随机生成彩色小圆点

import java.util.Random;
import java.util.Timer;
import java.util.Vector;

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

public class TimerCanvas extends Canvas{
     Vector v;
     Random r,gr,b;
     public TimerCanvas(){
    	 v=new Vector();
    	 r=new Random();
    	 gr=new Random();
    	 b=new Random();
    	 (new Timer()).schedule(new CreateBlock(this),3000,100);
     }
     public void addBlock(Block b){
    	 v.addElement(b);
     }
     public void paint(Graphics g){
    	 int red,green,blue;
    	 red=Math.abs(r.nextInt())%255;
    	 green=Math.abs(gr.nextInt())%150;
    	 blue=Math.abs(b.nextInt())%200;
    	 g.setColor(red,green,blue);
    	 int i=v.size();
    	 if(i-1>0)
    	 {
    		 Block b=(Block)v.elementAt(i-1);
    		 g.fillRect(b.x,b.y,b.w,b.h);
    	 }
     }
}