How to multiply two matrices and print the result using java

public class MatrixMultiplier {
    public static void main(String[] args) {
        int[][] matrix1 = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        int[][] matrix2 = {{9, 8, 7}, {6, 5, 4}, {3, 2, 1}};
        int[][] result = multiplyMatrices(matrix1, matrix2);
        printMatrix(result);
    }

    private static int[][] multiplyMatrices(int[][] mat1, int[][] mat2) {
        int rows1 = mat1.length;
        int cols1 = mat1[0].length;
        int cols2 = mat2[0].length;
        int[][] result = new int[rows1][cols2];

        for (int i = 0; i < rows1; i++) {
            for (int j = 0; j < cols2; j++) {
                for (int k = 0; k < cols1; k++) {
                    result[i][j] += mat1[i][k] * mat2[k][j];
                }
            }
        }
        return result;
    }

    private static void printMatrix(int[][] mat) {
        for (int[] row : mat) {
            for (int num : row) {
                System.out.print(num + " ");
            }
            System.out.println();
        }
    }
}