Get the number of arguments passed to a method with an unknown number of arguments

Question

I'm creating a method:

private boolean method(String... arguments){
   for (String argument : arguments) {
     ...
   }
   return true;
}

I'd like to know how many arguments are passed to my method.

Is there is a clean way of doing this, instead of just creating a method that would iterate each argument and count them one by one?

My aim would be to return false if the number of arguments passed to my method is odd.

a vararg is converted to an array, so `arguments.length` would work — QBrute, Feb 09 '18 at 12:47
technically, you are only passing one parameter, being an array of String objects. — Stultuske, Feb 09 '18 at 13:02

score 7 · Accepted Answer · answered Feb 09 '18 at 12:48

7

var-args are converted to array, so you can use .length on it:

arguments.length; // length of arguments

answered Feb 09 '18 at 12:48

Aniket Sahrawat

Thanks a lot ! Do you know how this way of passing arguments is called? – Nark Feb 09 '18 at 13:00
@Nofix Simply using `methodName(t1)` , `methodName(t1, t2)` or even `methodName()` would work fine. – Aniket Sahrawat Feb 09 '18 at 13:02
@Nofix You can read more about it at **[this link](https://www.javatpoint.com/varargs)** – Aniket Sahrawat Feb 09 '18 at 13:04

1 Answers1