Matrices

import java.util.Scanner;
//Same thing
//More practice of functions and parameters
public class Matrices {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter number of rows: ");
        int numRows = in.nextInt();
        System.out.println("Enter number of columns: ");
        int numColumns = in.nextInt();
        if ((numRows > 0 && numRows < 10) && ((numColumns > 0 && numColumns < 10))) {
            if (numRows <= numColumns) {
                int[][] matrix1 = new int[numRows][numColumns];
                int[][] matrix2 = new int[numRows][numColumns];
                int[][] empty = new int[numRows][numColumns];

                for (int i = 0; i < empty.length; i++) {
                    for (int j = 0; j < empty.length; j++) {
                        empty[i][j] = 0;
                    }
                }

                System.out.println("Elements of first matrix: ");
                for (int i = 0; i < numRows; i++) {
                    for (int j = 0; j < numColumns; j++) {
                        matrix1[i][j] = in.nextInt();
                    }
                }
                System.out.println("Elements of second matrix");
                for (int i = 0; i < numRows; i++) {
                    for (int j = 0; j < numColumns; j++) {
                        matrix2[i][j] = in.nextInt();
                    }
                }

                System.out.println("First matrix");
                printMatrix(matrix1);
                System.out.println("Second matrix: ");
                printMatrix(matrix2);
                System.out.println("Sum: ");
                int[][] sum = sumMatrix(matrix1, matrix2);
                printMatrix(sum);
                System.out.println("First next to the Second");
                printTwoMatrices(matrix1, matrix2);
                System.out.println("Direct: ");//as much as it may be called "direct"
                printTwoMatrices(matrix1, empty);
                printTwoMatrices(empty, matrix2);

            } else {
                System.out.println("Number of Rows less or equal to Number of Columns");
            }

        } else {
            System.out.println("Invalid!");
        }
    }


    public static void printMatrix(int[][] matrix) {
        for (int[] ints : matrix) {
            for (int column = 0; column < matrix[0].length; column++) {
                System.out.print(" " + ints[column] + " ");
            }
            System.out.println();
        }
    }

    private static int[][] sumMatrix(int[][] first, int[][] second) {
        int rows = first.length;
        int columns = first[0].length;
        int[][] sum = new int[rows][columns];
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                sum[row][column] = first[row][column] + second[row][column];
            }
        }
        return sum;
    }

    public static void printTwoMatrices(int[][] first, int[][] second) {
        for (int i = 0; i < first.length; i++) {
            for (int j = 0; j < first[i].length; j++) {
                System.out.print(" " + first[i][j] + " ");
            }
            for (int j = 0; j < second[i].length; j++) {
                System.out.print(" " + second[i][j] + " ");
            }
            System.out.println();
        }
    }
}