5. Matrix Shuffling

package TechFundamentals;

import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class array_temp {


    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String[] rowCol = scanner.nextLine().split("\\s+");
        int row = Integer.parseInt(rowCol[0]);
        int col = Integer.parseInt(rowCol[1]);
        String[][] matrix = new String[row][col];
        for (int i = 0; i < row; i++) {
            String[] input = scanner.nextLine().split("\\s+");
            matrix[i] = input;
        }
        String command = scanner.nextLine();
        while (!command.equals("END")) {
            String[] tokens = command.split("\\s+");
            if (!isValidInput(tokens)) {
                System.out.println("Invalid input!");
            } else {
                if (!checkValidNumber(matrix, tokens)) {
                    System.out.println("Invalid input!");
                } else {
                    int rowMatrix = Integer.parseInt(tokens[1]);
                    int colMatrix = Integer.parseInt(tokens[2]);
                    int rowChange = Integer.parseInt(tokens[3]);
                    int colChange = Integer.parseInt(tokens[4]);
                    String temp = matrix[rowMatrix][colMatrix];
                    matrix[rowMatrix][colMatrix] = matrix[rowChange][colChange];
                    matrix[rowChange][colChange] = temp;

                    printMatrix(matrix, row, col);
                }
            }
            command = scanner.nextLine();
        }
    }

    private static boolean checkValidNumber(String[][] matrix, String[] tokens) {

        if (0 > Integer.parseInt(tokens[1]) || Integer.parseInt(tokens[1]) > matrix.length ||
                0 > Integer.parseInt(tokens[2]) || Integer.parseInt(tokens[2]) > matrix[0].length ||
                0 > Integer.parseInt(tokens[3]) || Integer.parseInt(tokens[3]) > matrix.length ||
                0 > Integer.parseInt(tokens[4]) || Integer.parseInt(tokens[4]) > matrix[0].length) {
            return false;
        }

        return true;
    }

    private static void printMatrix(String[][] matrix, int row, int col) {
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < col; j++) {
                System.out.print(matrix[i][j] + " ");
            }
            System.out.println();
        }
    }

    private static boolean isValidInput(String[] tokens) {

        if (!tokens[0].equals("swap") || tokens.length != 5) {
            return false;
        }
        return true;
    }