listing28.4.java

java 完全探索的随书源码

public class BMW_540i extends Car {
  public BMW_540i(TireSpecification tires) {
    super(tires);
  }
}

public class Volvo_V70 extends Car {
  public Volvo_V70(TireSpecification tires) {
    super(tires);
  }
}