[java] memory allocated for the array with length zero.

Question

if yes then how we define the memory allocation for this array or how much it is.
https://code.sololearn.com/c4RI3jyKuW75/?ref=app

Answer 1

Yes, of course it would be 0. Arrays are the part of Object type data of Java. There are primarily two types of data - Primitive and Object. Object includes Arrays, ArrayLists, Scanner and Strings. Primitives include int, char, boolean, long and more. What happens is when we create an object with a size such as 0, memory is allocated to that object in the computer's memory, but however in accordance with its size.
For example, you say int[] arr = new int[0];
Now the length of arr is 0 because there is nothing actually stored in it. You see if it is int[] arr = new int[5] ... the length will be 5. The object's indexes are null because no value is assigned, however the size is not null !
You could better get by relating to this example...
String s = "";
System.out.print(s.length()); // Ouputs : 0
The length is 0 because there is nothing in the String. It contains nothing. However, it is not null.

I suggest you to learn Object data. That could clarify your doubts.

Answer 2

That's kinda unknowable I guess. If it says 0, I guess it's none. Until you store something in it, it won't be used.

Answer 3

Aaron Stone but question is that what's the mean of 0 space in (how much bits ) memory area. but thanks for your help I read object data