Help with a certain java problem

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1

So for my class, I have to take a picture and swap colors from red to green, blue to red, and green to blue for each pixel.

This is what I have:

public void swapRGB()
  {
    Pixel[] pixelArray = this.getPixels();
    Pixel pic = null;
    int value = 0;
    
    for(int index = 0; index < pixelArray.length; index = index + 1)
    {
      pic = pixelArray[index];
      
      int colorGreen = pic.getGreen();
      int colorBlue = pic.getBlue();
      int colorRed = pic.getRed();
      
      pic.setRed(colorGreen);
      pic.setBlue(colorRed);
      pic.setGreen(colorBlue);
    }
  }

Which works great, now for the second part I have to create another method that allows me to input a number of how many swaps I want. What is wrong is that the picture for the second method doesn’t change colors at all when I use my second method which is:

public void swapRGB2(int numSwaps)
  {
    for(int num = 0; num <= numSwaps; num = num + 1)
    {
     this.swapRGB(); 
    }
  }

When I use the first method it works flawlessly. Second method leaves the pictures unchanged. What am I doing wrong?

2

Check out your for loop in your swapRGB method.

Perhaps ‘refactoring’ the behavior our of that for loop into its own method called swapRGB might be beneficial. I would then consider renaming the original swapRGB method to be named swapAllPixels or something like that.

3

numSwaps is the number of how many times the program should swap the colors, so it can be whatever the user wants it too.

4

Is numSwaps divisible by 3?