import java.util.ArrayList;
import java.util.Calendar;

class Component {}

class Components extends ArrayList {}

// If we include a type parameter in the superclass, then there is no error below.
// class Components extends ArrayList<Component> {}

public class RawTypeAssignment {
  static Components getComponents() {
    return new Components();
  }

  static void addTimes(Calendar calendar) {
    // Type systems may issue an error below because of a mismatch between the type arguments.
    @SuppressWarnings("assignment")
    // :: warning: [unchecked] unchecked conversion
    ArrayList<Component> clist = getComponents();
    clist.get(0);
  }
}