Method to double a picture size and change to grayscale

Question

Hello, I'm having trouble figuring out whats wrong with my code. Its supposed to double to size of a picture and change it to grayscale, but when I call it I only get a double sized blank picture. I can't figure out how to get the picture itself to copy over when I call the method. Here is my code:
public Picture componentLayout()
   Picture targetPic = new Picture(2 * this.getWidth(), 2 * this.getHeight());
   Pixel[] pixelArray = this.getPixels();
   Pixel pixel = null;
   int intensity = 0;
   // loop through all the pixels
   for (int i = 0; i < pixelArray.length; i++)
     // get the current pixel
     pixel = pixelArray;
// compute the intensity of the pixel (average value)
intensity = (int) ((pixel.getRed() + pixel.getGreen() +
pixel.getBlue()) / 3);
// set the pixel color to the new color
pixel.setColor(new Color(intensity,intensity,intensity));
return targetPic;

Answer 1

Althought I'm not familiar with the Picture class, i do notice that your line:
Picture targetPic = new Picture(2 * this.getWidth(), 2 * this.getHeight());constructs a new instance of Picture, which is then never used until
return targetPic;therefor it is constructed, and returned in it's initial state, without ever being mutated.