Personal-Lessons/Java2DArrays Assignment at main · Benimaru13/Personal-Lessons · GitHub

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/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 */

package com.mycompany.java2darrays;

// Import important modules
import java.util.Arrays;
import java.util.Scanner;

/**
*
* Java Array Flipping Assignments
*
* This program modifies an existing grid based on user-inputted instructions.
* The possible modifications are a vertical and a horizontal swap
* @author  Chibueze Benneth
* @version Java25
* @since   2025-11-01
 */


public class Java2DArrays {

    public static void main(String[] args) {
        // This is the default array
        int [][] grid = {{1,2},
                         {3,4}
                                };
        // Take user input
        Scanner input = new Scanner(System.in);
        String word = input.nextLine();
        String[] words = word.split("");

        // Check what operation is being called
        for (String letter:words) {
            if (letter.equals("V")) {
                vFlip(grid);
            }
            if (letter.equals("H")) {
                hFlip(grid);
            }
        }
        input.close();
        // Print results
        printGrid(grid);

    }

    // Vertical Flip method
    public static void vFlip(int[][] arr2D) {
        // swap along the vertical axis
        int temp = arr2D[0][0];
        int temp2 = arr2D[1][0];
        arr2D[0][0] = arr2D[0][1];
        arr2D[0][1] = temp;

        arr2D[1][0] = arr2D[1][1];
        arr2D[1][1] = temp2;

    }

    // Horizontal Flip method
    public static void hFlip(int[][] arr2D) {
        // swap along the horizontal axis
        int temp = arr2D[0][0];
        int temp2 = arr2D[0][1];
        arr2D[0][0] = arr2D[1][0];
        arr2D[1][0] = temp;

        arr2D[0][1] = arr2D[1][1];
        arr2D[1][1] = temp2;

    }

    // method that prints out the numbers
    public static void printGrid(int[][] arr2D) {
        for (int [] row:arr2D) {
            // Nested for loop
            for (int num:row) {
                System.out.print((num + " "));

            }
            System.out.println(); // print new line after each array is printed
        }
    }

}