Does the addAll() differ from add()?

Question

while adding elements to a list(an ArrayList), sometimes adding an element brings up the all phrase I didn't type, so I end up removing it,
for example.
in this;
ArrayList<Integer> primes = new ArrayList<Integer> ();

when it comes to adding elements;

primes.add(3);

but as I open the parenthesis, something like auto correct occurs and this comes up:

primes.addAll(3);

I'm always inclined to delete off the "All".
does this "All" have an implication?

thanks?

Answer 1

You can use .addAll to add another whole List to your ArrayList; .add is only for single elements.

Answer 2

Schindlabua
oookay.
thanks very much

Answer 3

mark am in uganda too gv me yo contact so that we can connect