Thread: GetColor Not working

I am working on a fairly simple program where I have a colour change three times using the red green blue spectrum. The problem is that I keep getting a result of zero no matter what I do. Does anyone have any suggestions?

import java.awt.*;
 
class RectangleMain
{
  public static void main (String[] args)
  {
    ColouredRectangle blocky = new ColouredRectangle(50, 100, 20, 40, Color.red);
    System.out.println(blocky.getColour());
    blocky.mixColour(Color.blue);
    System.out.println(blocky.getColour());
    blocky.mixColour(Color.black);
    System.out.println(blocky.getColour());
  }
}

import java.awt.*;
 
public class ColouredRectangle extends Rectangle
{
  ColouredRectangle (int x, int y, int width, int height, Color colour)
  {
    super (x, y, width, height);
  }
 
  private Color colour;
 
  private int rVal;
  private int gVal;
  private int bVal;
 
  public void setColour(int r, int g, int b)
  {
    colour = new Color(r,g,b);
    rVal = r;
    gVal = g;
    bVal = b;
  }
 
  public String getColour()
  {
    return ("blocky's colour is java.awt.Color[Red = " + rVal + ", Green = " + gVal + ", Blue = " + bVal + "]");
  }
 
  public void mixColour(Color addColour)
  {
    int newRed = (addColour.getRed() + rVal) % 256;
    int newGreen = (addColour.getGreen() + gVal) % 256;
    int newBlue = (addColour.getBlue() + bVal) % 256;
    colour = new Color(newRed, newGreen, newBlue); 
  }
}

What do you mean you keep getting zero? Post a sample run or whatever it is you're seeing that shows the zero result.

Just glancing at the code. You never call setColor, so the values of rVal, bVal and gVal aren't ever changed by anything. Rethink your design...