Introduction to Parameters and Objects - Building Java Programs: A Back to Basics Approach - page 214

Here's the new version of the drawPyramid method that uses the fill color as a
parameter:

public static void drawPyramid(Graphics g, Color c,
int x, int y, int stairs) {
g.drawRect(x, y, 100, 100);

for (int i = 0; i < stairs; i++) {
int stairHeight = 100 / stairs;
int stairWidth = stairHeight * (i + 1);
int stairX = x + (100 - stairWidth) / 2;
int stairY = y + stairHeight * i;

g.setColor(c);
g.fillRect(stairX, stairY, stairWidth, stairHeight);
g.setColor(Color.BLACK);
g.drawRect(stairX, stairY, stairWidth, stairHeight);

}

}

Using this method, we can now draw all three pyramids easily by calling
drawPyramid three times with the appropriate parameters:

drawPyramid(g, Color.WHITE, 0, 0, 10);
drawPyramid(g, Color.RED, 80, 140, 5);
drawPyramid(g, Color.BLUE, 220, 50, 20);

One last improvement we can make to our Pyramids program is to turn the over-
all pyramid size of 100 into a constant, so there aren't so many 100s lying around in
the code. Here is the complete program:

1 // This program draws three colored pyramid figures.
2
3 import java.awt.*;
4
5 public class Pyramids {
6

public static final int SIZE = 100;

7
8

public static void main(String[] args) {

9 DrawingPanel panel = new DrawingPanel(350, 250);

10 Graphics g = panel.getGraphics();

11
12

drawPyramid(g, Color.WHITE, 0, 0, 10);

13 drawPyramid(g, Color.RED, 80, 140, 5);

14 drawPyramid(g, Color.BLUE, 220, 50, 20);

15 }

16
17 // draws one pyramid figure with the given