Adding a simple progress bar

A progress bar is a visual representation of a Real Number between zero and one or a percentage between 0% and 100%.

Below is a method for drawing a simple progress bar:

/**
 * @param g Graphics
 * @param x
 * @param y
 * @param w width
 * @param h height
 * @param p part between zero and total
 * @param t total
 */
void fillProgressBar (Graphics g, int x, int y, int w, int h, int p, int t) {
  g.drawRect(x, y, w, h);
  // p will receive the pixel width of the proportion: part / total
  p = (p * w) / t;
  g.fillRect(x, y, p, h);
}