Chapter 7, Problem 21E

Explanation of Solution

Method “transpose()” to invert the image:

import java.awt.Graphics;

import java.awt.Image;

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Scanner;

//Definition of class Test

public class Test

{

    //Definition of main class

    public static void main(String[] args)

    {

        //Create an object for DrawingPanel

DrawingPanel drawpanel = new DrawingPanel(280, 280);

        //Create an object for Image

Image image = drawpanel.loadImage("Stegosaurus.png");

        //Greate an object for Graphics

        Graphics graph = drawpanel.getGraphics();

        //Set the panel

        graph.drawImage(image, 0, 0, drawpanel);

        //Call the method transpose

        transpose(drawpanel);

    }

    //Definition of method transpose   

    public static void transpose(DrawingPanel panel)

    {

        //Create a two dimensional array

        int[][] pixels = panel...