Method main

patterns/trash/GroupingBy.java:11–18

(String[] args)

public class GroupingBy {
  public static void main(String[] args) {
    List<Trash> bin = new ArrayList<>();
    ParseTrash.fillBin("trash", bin);
    Map<Class, List<Trash>> m =
      bin.stream().collect(
        Collectors.groupingBy(Object::getClass));
    ClassToListOfTrashMap.show(m);
  }
}
/* Output:
Loading patterns.trash.Cardboard