package cn.edu.bjut.chapter5; public class MatrixTester { public static void main(String[] args) { double[][] values1 = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; double[][] values2 = { { 9, 8, 7 }, { 6, 5, 4 }, { 3, 2, 1 } }; Matrix mat1 = new Matrix(values1); Matrix mat2 = new Matrix(values2); System.out.println("matrix1: "); System.out.println(mat1); System.out.println("matrix2: "); System.out.println(mat2); System.out.println("matrix1 + matrix2: "); System.out.println(mat1.add(mat2)); System.out.println("matrix1 - matrix2: "); System.out.println(mat1.substract(mat2)); System.out.println("matrix1 * matrix2: "); System.out.println(mat1.multiplicate(mat2)); } }