Array Length in Java

Question

I declared an array as shown below:

int[] arr = new int[10]; 

Then I assigned following values to the array:

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

Then I declared and initialized an integer variable:

int arrayLength = arr.length; 

This will be useful to find actual size but is there any method to find logical size of the array?

Answer 1

It contains the allocated size, 10. The unassigned indexes will contain the default value which is 0 for int.