Question

I am using java.util.ArrayList, I want to remove all the occurrences of a particular element.

    List<String> l = new ArrayList<String>();
    l.add("first");
    l.add("first");
    l.add("second");

    l.remove("first");

It’s removing only the first occurrence. But I want all the occurrences to be removed after l.remove("first"); I expect list to be left out only with the value “second”. I found by googling that it can be achieved by creating new list and calling list.removeAll(newList). But is it possible to remove all occurrences without creating new list or is there any API available to achieve it ?

Answer 1

l.removeAll(Collections.singleton("first"));