car.java

《深入浅出设计模式》的完整源代码

package carstate;

//汽车类，具有状态变量：
public class Car {
  private State current;

  public Car() {
    current = new Off();
    System.out.println("新车生产出来了，现时空档");
  }
  public void setState( State s ) { current = s; }
  public void pull() { current.pull( this ); }
}