public static void main(String[] arg) { Matrix2D object_1 = new Matrix2D(); int[][] matrix_1 = {{1, 2}, {3, 4}}; int[][] matrix_2 = {{1, -5}, {3, 4}}; int[][] array = object_1.add(matrix_1, matrix_2); for (int[] row : array) { for (int colum : row) System.out.print(colum + "\t"); System.out.println(); } int[][] multt = object_1.mult(matrix_1, matrix_2); System.out.println("\nMult:"); for (int[] row : multt) { for (int colum : row) System.out.print(colum + "\t"); System.out.println(); } }