OnJava8-Examples/reuse/SpaceShipControls.java

// reuse/SpaceShipControls.java
// <20>2015 MindView LLC: see Copyright.txt

public class SpaceShipControls {
  void up(int velocity) {}
  void down(int velocity) {}
  void left(int velocity) {}
  void right(int velocity) {}
  void forward(int velocity) {}
  void back(int velocity) {}
  void turboBoost() {}
}