rectcanvas.java

j2me的程序

import javax.microedition.lcdui.*;

public class RectCanvas extends Canvas{
  int width = 0;
  int height = 0;

  public void paint(Graphics g){
	  width = getWidth();
	  height = getHeight();

	  g.setGrayScale(255);
	  g.fillRect(0,0,width-1,height-1);

	  g.setGrayScale(0);
	  g.drawRect(0,0,width-1,height-1);

	  g.drawRect(5,5,40,40);
      g.fillRoundRect(25,25,40,40,15,15);
   }

}