Delete AcceptFile.java

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

*/

public class AcceptFile {

    public static void main(String[] args) {

        String fileName = "correctInput.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());

            //to save the point in the file after reading width and height (line 3)

            br.mark(1000);

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

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

                return;

            }

            // 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 += 1;

            }

            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

            br.reset(); // puts us back to line 3 and no longer need to skip first two lines

            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;

                    }

                }

            }

            // 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());

        }

    }

}