clear one's rows and columns to 0 whose vlaue is 0

 1 public class Q1_7{
 2
 3 public static void SetZero(int[][] matrix){
 4
 5 boolean [] row= new boolean[matrix. length];
 6
 7 boolean[] column =new boolean[ matrix[0]. length]; //列数
 8
 9 for(int i =0;i <matrix .length ;i ++){
10
11 for(int j =0;j <matrix [0].length ;j ++){
12
13 if(matrix [i ][j ]==0){
14 row[i ]=true;
15 column[j ]=true;
16 }
17
18
19 }
20
21
22
23 }
24
25
26 for(int i =0;i <matrix .length ;i ++){
27
28 for(int j =0;j <matrix [0].length ;j ++){
29 if(row [i ]||column [j ]){
30
31 matrix[i ][j ]=0;
32
33 }
34
35
36 }
37
38 }
39
40
41 }
42
43
44 public static void main(String[] args){
45
46         int[][] matrix = new int[][]{
47                         {1,2,3,4,},
48                         {5,6,7,8,},
49                         {9,1,2,4},
50                         {2,0,4,9}
51                      };
52
53
54
55 SetZero( matrix);
56 for(int i =0;i <4;i ++){
57 for(int j =0;j <4;j ++){
58
59 System.out.print( matrix[ i][ j]);
60
61
62 }
63
64 System.out.println();
65
66 }
67
68 }
69
70
71 }

clear one's rows and columns to 0 whose vlaue is 0