import java.util.ArrayList; import java.util.TreeSet; import java.util.List; public class Demo { public static void main(String[] args) { List<String>ls = new ArrayList<String>(); ls.add("A"); ls.add("B"); ls.add("C"); ls.add("D"); ls.add("D"); ls.add("E"); ls.add("F"); ls.add("G"); ls.add("E"); TreeSet<String>set = new TreeSet<String>(); set.addAll(ls); System.out.println("TreeSet = "+set); } }
We use cookies to provide and improve our services. By using our site, you consent to our Cookies Policy. Accept Learn more