spaceshipcontrols.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 12 行

//: 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() {}
} ///:~