Question

我正在尝试使用另一个类中的add方法，以便我可以测试我的程序，但我仍然坚持如何继续。

在我的Apartment课程中，我创建了一个添加方法

public void addApartment(Apartment newApartment)
{
   House ApartmentEntry = new Apartment();
   ApartmentEntry= newApartment;
   ArrayList.add(ApartmentEntry);
}

在Company课程中，我尝试使用上述方法添加Apartment，如下例所示（在Company中）：

addApartment(price, numberofbaths, numberofbedrooms, squarefeet);

Answer 1

由于您的addApartment方法不是静态的，因此您必须创建Company to use it. Plus, you don't have an addApartment method taking several parameters, so I guess you wanted to use those for the constructor of公寓的实例：

Company company = new Company(args);
company.addApartment(new Apartment(price, numberofbaths, numberofbedrooms, squarefeet));

Answer 2

好吧，假设你有一个带有这样的构造函数的Apartment类：

public class Apartment{

    public Apartment(int price, int numberOfBaths, int numberOfBedrooms, int squarefeet){
         this.price = prive;
         ...
    }
}

这是您创建新的公寓实例的方式：

Apartment newApartment = new Apartment(price, numberOfBaths, numberOfBedrooms, squarefeet);

知道，你的addApartment方法看起来可能是这样的：

public void addApartment(int price, int numberOfBaths, int numberOfBedrooms, int squarefeet)
{
   House ApartmentEntry = new Apartment(price, numberOfBaths, numberOfBedrooms, squarefeet);
   ...
}

我不知道你想用ArrayList做什么，但肯定你必须先声明它：

ArrayList<Apartment> list = new ArrayList<Apartment>();
list.add(newApartment);

Answer 3

在我看来，您正试图将Apartment添加到Company？

Company类应该使用addApartment(...)方法。

所以Company类就像：

    public class Company{
        private ArrayList<Apartment> apartments;

        public Company(){
            apartments = new ArrayList<Apartment>();
        }

        public addApartment(Apartment apartment){
            this.apartments.add(apartment);
        }
    }

然后你会简单地说：

Company company = new Company(args...);
company.addApartment(new Apartment(price, numberOfBaths, numberOfBedrooms, squarefeet));

如何为另一个类使用add方法

3 个答案: