car.java~2~

来自「《深入浅出设计模式》的完整源代码」· JAVA~2~ 代码 · 共 9 行

package carstate;

public class Car {
  private State current;

  public Car() { current = new Off(); }
  public void setState( State s ) { current = s; }
  public void pull() { current.pull( this ); }
}