Java Initialize an int array in a constructor

Question

I have a class and in that class I have this:

 //some code
 private int[] data = new int[3];
 //some code

Then in my constructor:

Answer 1

This is because, in the constructor, you declared a local variable with the same name as an attribute.

To allocate an integer array which all elements are initialized to zero, write this in the constructor:

data = new int[3];

To allocate an integer array which has other initial values, put this code in the constructor:

int[] temp = {2, 3, 7};
data = temp;

or:

data = new int[] {2, 3, 7};