import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import java.util.List;import java.util.Optional;public class Lambda1 {
         public static void main(String[] args) {        List
     
       names = Arrays.asList("peter", "anna", "mike", "xenia");        Collections.sort(names, new Comparator
      
       () {            @Override            public int compare(String a, String b) {                return b.compareTo(a);            }        });        Collections.sort(names, (String a, String b) -> {            return b.compareTo(a);        });        Collections.sort(names, (String a, String b) -> b.compareTo(a));        Collections.sort(names, (a, b) -> b.compareTo(a));        System.out.println(names);        names.sort(Collections.reverseOrder());        System.out.println(names);        List
       
         names2 = Arrays.asList("peter", null, "anna", "mike", "xenia");        names2.sort(Comparator.nullsLast(String::compareTo));        System.out.println(names2);        List
        
          names3 = null;        Optional.ofNullable(names3).ifPresent(list -> list.sort(Comparator.naturalOrder()));        System.out.println(names3);    }}