Filling Rectangles

The drawRect() method draws an open rectangle, a box if you prefer. If you want to draw a filled rectangle, use the fillRect() method. Otherwise the syntax is identical.

This program draws a filled square in the center of the applet. This requires you to separate the applet width and height from the rectangle width and height. Here's the code:

import java.applet.*;    
import java.awt.*; 

public class FillAndCenter extends Applet {

  public void paint(Graphics g) {

    int appletHeight = this.getSize().height;
    int appletWidth  = this.getSize().width;
    int rectHeight   = appletHeight/3;
    int rectWidth    = appletWidth/3;
    int rectTop      = (appletHeight - rectHeight)/2;
    int rectLeft     = (appletWidth - rectWidth)/2;
    
    g.fillRect(rectLeft, rectTop, rectWidth-1, rectHeight-1);
    
  }

}