import java.util.*;
public class bar {
  public static void main(String[] args) {
    HashSet <string> hs1 = new HashSet <string>();
    hs1.add("Cemal Sureya");
    hs1.add("Nazim Hikmet");
    hs1.add("Turgut Uyar");
    hs1.add("Orhan Veli");
    hs1.add("Sabahattin Ali");
    hs1.add("Sabahattin Ali");
    hs1.add("Sabahattin Ali");

    System.out.println("Yazarlarin HashSet ile Sirasiz Hali:" +hs1);

    TreeSet <string> trees1= new TreeSet <string> (hs1);
    System.out.println("TreeSet ile Alfabetik Sirali Hali:" + trees1);

  }
}

/*
www.yazilimkaravani.net
Ali Murat Çevik - 2018
*/