java - 在 Java 中初始化二维数组

Question

1. 在数组中，我们可以初始化如下内容:

   int[] arr = {1, 2, 3, 4, 5};

2. 但是对于二维数组，为什么下面不正确？

   public class Main {
       public static void main(String[] args) {
          int[][] arr = new int[3][];
          arr[0] = new int[]{1,2,3}; //This is the correct way
   
          arr[0] = {1,2,3};  // ->Why this is not right? 
       }
   }
   

Answer 1

Yes, you are correct the second way of creating a 2D array will not work because when the compiler will compile the code because it couldn't decide its type.