Java eliminates duplicates in list

Import java.util.arraylist;import java.util.hashset;import java.util.list;public class  removerepart {    public static void main (String[] args)  {        List<String> list = new  Arraylist<string> ();         list.add ("Zhang San");         list.add ("Zhang 31");         list.add ("Zhang 32");         list.add ("Zhang San");         list.add ("Zhang 31");         list.add ("Zhang 32");                 //Method One          for  (Int i = 0; i < list.size ();  i++)  {       &nBsp;     system.out.println ("Native list:" +list.get (i));         }        //Method Two          hashset h = new hashset (list);         System.out.println ("Put list in HashSet:" +h)   //[Zhang San,  Zhang San 1,  Zhang San 2]         list.clear ();          system.out.println (" List call Clear () after: "+list);   //[]        list.addall (h);  &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;SYSTEM.OUT.PRINTLN ("Processed list:" +list);   //[Zhang San,  Zhang 31,   Zhang San 2]    }}

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Java eliminates duplicates in list