9. 4. 1. 二维数组矩阵 Initialize a two-dimensional array in matrix

 Initialize 初始化； dimensional 空间；matrix 矩阵 黑客帝国；

public class TwoDimensionalArray {public static void main(String[] args) {double m[][] = {{0*0, 1*0, 2*0, 3*0},{0*1, 1*1, 2*1, 3*1},{0*2, 1*2, 2*2, 3*2},{0*3, 1*3, 2*3, 3*3}};int i, j;for(i = 0; i < 4; i++){for(j = 0; j < 4; j++){System.out.print(m[i][j] + " ");}System.out.println();/** * 0.0 0.0 0.0 0.0  * 0.0 1.0 2.0 3.0  * 0.0 2.0 4.0 6.0  * 0.0 3.0 6.0 9.0  */}}}