Remove all elements from a List after a particular index

Question

Is there any convenient way in List/ArrayList by which we can remove all elements of a List after a particular index. Instead of manually looping through it for removing.

To be more explanatory, if I have a list of 10 elements, I want to mention index 3 and then all elements after index 3 gets removed and my list would consist of only starting 4 elements now (counts from 0)

Answer 1

list.subList(4, list.size()).clear(); 

Sublist operations are reflected in the original list, so this clears everything from index 4 inclusive to list.size() exclusive, a.k.a. everything after index 3. Range removal is specifically used as an example in the documentation:

This method eliminates the need for explicit range operations (of the sort that commonly exist for arrays). Any operation that expects a list can be used as a range operation by passing a subList view instead of a whole list. For example, the following idiom removes a range of elements from a list:

     list.subList(from, to).clear(); 

Answer 2

Using sublist() and clear(),

public class Count {     public static void main(String[] args)     {         ArrayList<String> arrayList = new ArrayList<String>();         arrayList.add("1");         arrayList.add("2");         arrayList.add("3");         arrayList.add("4");         arrayList.add("5");         arrayList.subList(2, arrayList.size()).clear();         System.out.println(arrayList.size());     } }