Is there a way to get the index of an item in array

Processing Beginners
1

Is there a way to get the index of an item in an array of a given ArrayList?
I know you could use

int test(String item) {
    for(int i = 0; i < items.size() && items.contains(item); i++) if(item == items.get(i)) return(i);
    return -1;
}

but is it the best way to do it?

Is there something like

int v = items.getIndex(item); //?
2

maybe indexOf?

see ArrayList (Java Platform SE 8 )

This link is from the reference ArrayList \ Language (API) \ Processing 3+

3

Yes, it is indexOf. You can also make a method that gets the position, like this:

ArrayList<Integer> numbers = new ArrayList<Integer>();
numbers.add(0);
numbers.add(1);
numbers.add(2);
//first method
int getIndex (int number) {
  for (int i = 0; i < numbers.size(); i++) {
    if (numbers.get(i) == number) {
      return i;
    }
  }
  return 0;
}
//second method
int index = numbers.indexOf(1);