Collections Data Structure Java

import java.util.Arrays;
import java.util.SortedSet;
import java.util.TreeSet;
public class Tail {
  public static void main(String args[]) throws Exception {
    String elements[] = { "Irish Setter", "Poodle", "English Setter",
        "Gordon Setter", "Pug" };
    SortedSet set = new TreeSet(Arrays.asList(elements));
    System.out.println(set.tailSet("Irish Setter"));
    System.out.println(set.headSet("Irish Setter"));
    System.out.println(set.headSet("Irish Setter\0"));
    System.out.println(set.tailSet("Irish Setter\0"));
    System.out.println(set.subSet("Irish Setter", "Poodle\0"));
    System.out.println(set.subSet("Irish Setter", "Irish Setter\0"));
    System.out.println(set.subSet("Irish Setter", "Irish Setter"));
  }
}