System.arrayCopy() copies object or reference to object?

Question

I am having a final class NameAndValue. I copied an array of NameAndValue objects using System.arrayCopy() and when i changed a

Answer 1

    int[] a = {1, 2, 3};
    int[] b = new int[3];
    System.arraycopy(a, 0, b, 0, 3);
    b[1] = 0;
    System.out.println(Arrays.toString(b));
    System.out.println(Arrays.toString(a));

The output is like this: [1, 0, 3] [1, 2, 3]