Question

I am creating combinations of integer-arrays and adding them to a Vector to store them for later use.
I do the combination by looping over the int[] and then add the element to the vector.

Does the Vector only add the reference to the int[] and therfore I will keep lots of references to the same int[] at the end or does it add a copy to the Vector?

Answer 1

The arrays, including int[] are Objects in Java. This means that your Vector is holding references to your int[] elements.

However, I suggest you use ArrayList instead of Vector or Collections.synchronizedList if you really need a synchronized version of a List.