Question

JAVA 请定义一个2行3列的int类型的数组，其值为｛｛1，2，3｝，｛2，4，6｝｝并将其每个元素全部显示

Answer 1

int[][] a=new int[][]{{1,2,3},{2,4,6}};
for(int i=0,il=a.length;i<il;i++){
for(int j=0,jl=a[i].length;j<jl;j++){
System.out.print(a[i][j]+" ");
}
System.out.println();
}

Answer 2

int a[][] = new int[2][3];
a[0] = new int[]{1,2,3};
a[1] = new int[]{2,4,6};

for(int x[] : a){
for(int n : x){
System.out.print(n+" ");
}
}

Answer 3

int [][] arr=new int[][] {{1,2,3},{2,4,6}};
for(int i=0;i<arr.length;i++){

for(int j=0;j<arr[i].length;j++){
System.out.print(arr[i][j]+",");
}
}