Java Stream - 如何sort String带有Lambda表达式的流

import java.util.Arrays;
import java.util.List;

public class Main {
  public static void main(String[] args) {

    List<String> friends = Arrays.asList("CSS", "HTML", "Oracle", "Dart");

    //just sort using lambda comparator
    System.out.println("sort:");
    friends.stream().sorted((aName, bName) -> aName.compareTo(bName))
        .forEach(System.out::println);
  }
}