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Java Introduction to Functional Programming Java's Functional Toolset Using forEach

Maximilian Hertelendy
Maximilian Hertelendy
18,148 Points

Local Code Challenge

I stuck with this type of challenge. I waited for weeks and nothing happened ("the test are running"). What did I wrong?

public class Printer {

  public static void main(String[] args) {
    List<String> chipmunks = Arrays.asList("Alvin", "Simon", "Theodore");
    System.out.println("Imperative results:");
    System.out.println("Declarative results:");

  public static void printChipmunksImperatively(List<String> chipmunks) {
    for (String chipmunk : chipmunks) {
      System.out.printf("%s! %n", chipmunk);

  public static void printChipmunksDeclaratively(List<String> chipmunks) {
    // TODO: Print out each of the chipmunks using the forEach method on Iterable
    Consumer<String> printer = chipmunk -> System.out.printf("%s! %n", chipmunk);

I uploaded my submissions in September and "the test are still running". I have the same problem with this type of challange multiple times.