khamiltonuk

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

public class SecureTokenInterceptor extends HandlerInterceptorAdapter {
    private SecureTokenService secureTokenService;

    /**
     * Constructor.
     *
     * @param secureTokenService - service to store/retrieve tokens
     */

khamiltonuk

/**
 * Annotation to mark a controller handler as requiring secure token checking
 */
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface SecureToken {
    String TOKEN_PARAMETER_NAME = "secureToken";

    String value();
}

khamiltonuk

query = new BasicDBObject("i", 
    new BasicDBObject("$gt", 20).
        append("$lte", 30)); 

cursor = coll.find(query);

khamiltonuk

Map<Person.Sex, Double> averageAgeByGender = roster
  .stream()
  .collect(
    Collectors.groupingBy(
      Person::getGender,
      Collectors.averagingInt(Person::getAge)));

khamiltonuk

Stream.of(aListOfNumbers)
  .sorted()
  .limit(10)

khamiltonuk

reddit.stream()
.map(post -> if(post.isCatPost) return post.getComments(); else return 0;)
.reduce(0.0, (c1, c2) -> c1 + c2);

khamiltonuk

public interface MyInterface {
  
  default public int rollD20() {
    return Constants.thaco;
  }
}

khamiltonuk

public interface MyInterface {
  default public int rollD6() {
    return 4; //guaranteed random by roll of dice
  }
}

khamiltonuk

MyFunctionalInterface deepThought = () -> return 42;

public void answerMe(MyFunctionalInteface calculator) { ... }

answerMe(deepThought);
answerMe(() -> return 42;)

khamiltonuk

@FunctionalInterface
public interface MyFunctionalInterface {
  
  public int theQuestion();
  
}