import java.util.*;

/** Comparator.
 * @author Jaanus Poeial
 * @since 1.8
 */
public class J8example2 {

  public static void main (String[] args) {

    List<Integer> myList = Arrays.asList (1, 0, 2, 3, -1);
    myList.forEach (System.out::println);  // Java 8 simple pass through

    // multiply each element of the list by 2 and find the first element
    //    that is bigger than 3 (null, if there is no such element)
    System.out.println ("This element is: " 
        + myList.stream()
                .map(e->e*2)
                .filter(e->(e>3))
                .findFirst()
                .orElse (null) );

    // old style comparator (Java 2)
    Comparator<Integer> cmp = new Comparator<Integer>() {
      @Override
      public int compare (Integer n1, Integer n2) {
        return (n1>n2?1:(n1<n2?-1:0));
      }
    };
    Collections.sort (myList, cmp);
    System.out.println (myList);
    Collections.shuffle (myList);
    System.out.println (myList);

    // Java 8 comparator as lambda expression
    Collections.sort (myList, (n1, n2) -> n1>n2?1:(n1<n2?-1:0));
    System.out.println (myList);

  }

}