Empty arrays automatically initialize contents?

Question

How come

int alone;
System.out.println(alone);

Gives errors but

 int[] arr = new int[1];
 System.out.println(arr[0]);
         


        

Answer 1

Yes, for primitive type number arrays, it initializes with 0, for boolean[], it initializes with false, for char[], it initializes with NULL(ASCII value 0) and for objects [] including String[] its initializes with null.