I need a test code for the following code plz.

import java.util.Iterator; import java.util.Scanner; import java.util.StringTokenizer; import java.util.TreeSet; public class treeSetString {

TreeSet al=new TreeSet(); { System.out.println("Enter the String Line");

Scanner s =new Scanner(System.in);

String a = s.nextLine();

StringTokenizer st = new StringTokenizer(a," ");

while (st.hasMoreTokens()) {

al.add(st.nextToken());

}

System.out.println("Treeset:");

Iterator itr=al.iterator();

while(itr.hasNext()){

System.out.println(itr.next());

}

}

}