Question

I have an ArrayList that I loop and through some logic I would remove an element at a particular index.

However while I am looping the Arraylist and removing on the way, the ArrayList size and index of particular items are changing as well, resulting in unexpected results.

Anyway to circumvent this?

Answer 1

Here’s the code for the iterator approach – substitute your own condition and add generics types <> as needed:

Iterator it = list.iterator(); 
while(it.hasNext()){
    Object o = it.next();
    if(someCondition(o)){
        it.remove();
    }
}

And, as JohnB said in the comments, ArrayList isn’t very efficient if you are removing lots of items from large lists…