Initializing an array after the declaration

Question

Why we cannot use array intializer after declaring an variable.

For example:

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

But,

int          


        

Answer 1

Because an array doesn't work like that in java.

int arr[4];
arr[0] = 1; 
arr[1] = 2; 
arr[2] = 3; 
arr[3] = 4;