java remove duplicates
import java.util.*;
public class RemoveDuplicatesFromArrayList {
    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1,2,2,2,3,5);
        System.out.println(numbers);
        Set<Integer> hashSet = new LinkedHashSet(numbers);
        ArrayList<Integer> removedDuplicates = new ArrayList(hashSet);
        System.out.println(removedDuplicates);
    }
}
