Replace GetPixels.java

import java.io.File;

import java.io.FileWriter;

import java.awt.Color;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;

public class GetPixels {

   public static void main(String args[])throws Exception {

      FileWriter writer = new FileWriter("rgb_value.txt");

      //Reading the image

      File file= new File("foswiki.png");

      BufferedImage img = ImageIO.read(file);

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

/**

* AcceptFile class that reads a text file and identifies whether it is in the

* following format:

* 1) First two lines must contain exactly one integer (representing width & length)

* 2) There must be width * height more lines after

* 3) Each of these lines must have exactly 3 integers with values within 0 to 100 inclusive

* @param String fileName

* @return error messages if criterias are not met

*/

      //Retrieving image width and height

      int width = img.getWidth();

      int height = img.getHeight();

      writer.write("Image Width: " + width + "\n");

      writer.write("Image Height: " + height + "\n");

public class AcceptFile {

    public static void main(String[] args) {

        String fileName = "wrongInput.txt"; // Replace with the name of text file to check

        // BufferedReader is used to parse through text file line by line

        try (BufferedReader br = new BufferedReader(new FileReader(fileName))) {

            // Read and check the first two lines to get the width and height

            String line = br.readLine();

            int width = Integer.parseInt(line.trim());

            line = br.readLine();

            int height = Integer.parseInt(line.trim());

      int red_c, green_c, blue_c;

      for (int y = 0; y < img.getHeight(); y++) {

         for (int x = 0; x < img.getWidth(); x++) {

            //Retrieving contents of a pixel

            int pixel = img.getRGB(x,y);

            //Creating a Color object from pixel value

            Color color = new Color(pixel, true);

            //Retrieving the R G B values scaled to 0 to 100

            int red = (int)((color.getRed() / 255.0) * 100);

            int green = (int)((color.getGreen() / 255.0) * 100);

            int blue = (int)((color.getBlue() / 255.0) * 100);

            if (width <= 0 || height <= 0) {

                System.out.println("Error: width and height must be positive integers.");

                return;

            //int red = color.getRed();

            //int green = color.getGreen();

            //int blue = color.getBlue();

            }

            writer.append(red+":");

            writer.append(green+":");

            writer.append(blue+"");

            writer.append("\n");

            writer.flush();

            // Check that there are width * height more lines in the file

            int expectedNumLines = width * height;

            int currentNumLines = 0; // Counter to keep track number of lines

            while ((line = br.readLine()) != null) {

                currentNumLines++;

            }

            if (expectedNumLines != currentNumLines) {

                System.out.println("Error: Expected " + expectedNumLines + " lines, but found " + currentNumLines + " lines.");

                return;

            }

            // Check that each of the following lines has exactly 3 integers between 0 and 100

            for (int i = 0; i < 2 + expectedNumLines; i++) { // We skip the first two lines

                br.readLine();

            }

            while ((line = br.readLine()) != null) {

                String[] tokens = line.split("\\s+");

                if (tokens.length != 3) {

                    System.out.println("Error: Line \"" + line + "\" does not contain exactly 3 integers.");

                    return;

                }

                for (String token : tokens) {

                    int value = Integer.parseInt(token);

                    if (value < 0 || value > 100) {

                        System.out.println("Error: Value " + value + " is not between 0 and 100.");

                        return;

                    }

                }

            }

            br.close();

      writer.close();

      System.out.println("RGB values at each pixel are stored in the specified file");

            // When text file meets all the requirements

            System.out.println("The file \"" + fileName + "\" meets all the requirements.");

        } catch (IOException e) {

            System.out.println("Error reading file \"" + fileName + "\": " + e.getMessage());

        } catch (NumberFormatException e) {

            System.out.println("Error parsing integer \"" +  "\": " + e.getMessage());

        }

    }

}