Initialization of Array in Java

[mohitkanodia713 (Mohit Kanodia)]

Array are defined to be object in Java rather than primitive type. correct me if I am wrong.
Why is that array are initialize to 0 and not null, unlike other Java object.

[Jaa18Crx0002 (Sanyam Jain)]

Hi Mohit,
Refer to thread give below:

Array in Java Initialize

Hi Mohit, when you just declare an integer array i.e. int[] arr; in the above statement arr is an integer array and compiler will assign a null value to it. But when you intialize it with new keyword i.e. int[] arr = new int[length]; the compiler will assign a continuous block of memory of size equal to lenght*4 bytes as one integer takes 4 bytes and in this every 4 byte block will store 0 by default.

[mohitkanodia713 (Mohit Kanodia)]

Can we say when we say int[] arr; then arr stores a null value.
But when int[] arr = new int[length], then arr stores references(memory address) to first integer arr[0].

[Jaa18Crx0002 (Sanyam Jain)]

Yes you can say this.

[Riyabansal98 (Riya Bansal)]

Hi Mohit

As you are not responding to this thread, I am marking your doubt as Resolved for now. Re-open it if required.
Please mark your doubts as resolved in your course’s “ Ask Doubt ” section, when your doubt is resolved.