Sets?{Resolved}

[Dillinger4]

For some reason when i create a Set multiple ways that contains the elements of a String[] that contains duplicates the Set ends up containing duplicates. This shouldnt be happening. Am i doing somthing wrong?

 import java.util.*; 
 
 public class T{ 
   public static void main(String args[]){ 

   String[] sarray={"1","4","4","5","4","3","6","4"}; 
 /*
   contains duplicates 
   Collection l = new ArrayList(Arrays.asList(sarray));
   Set s = new TreeSet(l); 

   for(Iterator i = s.iterator(); i.hasNext();){ 
      System.out.print(i.next());
   }
*/ 

 /*
   contains duplicates 
   Set s = new TreeSet(); 
   for(int i = 0; i < sarray.length; i++){
    s.add(sarray[i]); 
   }
  for(Iterator i = s.iterator(); i.hasNext();){ 
      System.out.print(i.next());
   }
 */
  
  /*
   contains duplicates 
   Set s = new TreeSet(); 
   for(int i = 0; i < sarray.length; i++){
    s.add(sarray[i]); 
   }
  
   Object[] o = s.toArray(); 
   for(int i = 0; i < o.length; i++){
    System.out.print(o[i]);  
   }
 */ 
  }    
 }