How to remove duplicate data from arraylist

package samset;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

public class RemoveDuplicateData {

public static void main(String[] args)

{

List myList = new ArrayList();

      myList.add("one");

      myList.add("two");

      myList.add("three");

      myList.add("one");//Duplicate Element

      myList.add("one");//Duplicate Element

     // java provide directly passed your arraylist data in HashSet constructor.. 

   

        HashSet set=new HashSet(myList);

     // Now you create new List and add HashSet data in List constructor

        List myList2 = new ArrayList(set); //no order

    //  If you want your List data is show in order form don't worry you use LinkedHashSet         collection

     // List myList  = new ArrayList(new LinkedHashSet(myList)); 

     Iterator it= myList 2.iterator();

     while(it.hasNext())

     {

     System.out.println(it.next());

     }

}

}

Note :-

if you want how to change Set data to ArrayList or ArrayList to Set the see 

Set setobject = new HashSet(listObject);

List listobject = new ArrayList(setObject);

Output :-

one,two,three

Enjoy friends

Thank you