为什么a[1]=b[1][3]

Question

public class E {  public static void main (String args[]){    int [] a={10,20,30,40},b[]={{1,2},{4,5,6,7}};    b[0]=a;         b[0][1]=b[1][3];      System.out.println(b[0][3]);      System.out.println(a[1]);         }}

Answer 1

因为b[0]==a,所以b[0][1]==a[1],后面又有b[0][1]==b[1][3],所以a[1]==b[1][3]