spaceshipcontrols.java

一些关于java继承的小例子

//: reusing/SpaceShipControls.java

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() {}
} ///:~