java basics supplementary points --- two-dimensional array

#java basics supplementary points --- two-dimensional array

First, the definition of a two-dimensional array

int[][] ns={
            {1,2,3,4},
            {5,6,7,8},
            {9,10,11,12},
            {13,14,15,16}
    };

Traversing dimensional array
1. enhanced for loop traversal two-dimensional array
for (int [] ARR: NS) {
for (int n-: ARR) {
of System.out.print (n-+ ",");
}
the System .out.println ();
}

2. 使用Arrays.deepToString()库来实现遍历
 System.out.println("===========实现库=======");
    System.out.println(Arrays.deepToString(ns));