java - 如何知道一个方法被主类调用了多少次？

Question

我的问题是找出从主类调用weight() 方法的次数。我应该在 totalWeightsMeasured() 方法中计算它。

代码的输出应该是 0,2,6。 (编辑//我早些时候在这里有 0,2,4 但输出实际上应该是 0,2,6)

但我只是不知道您如何计算它，我已经尝试用谷歌搜索和搜索所有内容，但我只是不知道该怎么做。 (并且您不应该再添加任何实例变量)

类:

public class Reformatory
{
    private int weight;



    public int weight(Person person)
    {
        int weight = person.getWeight();

        // return the weight of the person
        return weight;
    }
    public void feed(Person person)
    {
        //that increases the weight of its parameter by one.
        person.setWeight(person.getWeight() + 1);

    }
    public int totalWeightsMeasured()
    {


        return 0;
    }

}

主要内容:

public class Main
{

    public static void main(String[] args)
    {
        Reformatory eastHelsinkiReformatory = new Reformatory();

        Person brian = new Person("Brian", 1, 110, 7);
        Person pekka = new Person("Pekka", 33, 176, 85);

        System.out.println("total weights measured "+eastHelsinkiReformatory.totalWeightsMeasured());

        eastHelsinkiReformatory.weight(brian);
        eastHelsinkiReformatory.weight(pekka);

        System.out.println("total weights measured "+eastHelsinkiReformatory.totalWeightsMeasured());

        eastHelsinkiReformatory.weight(brian);
        eastHelsinkiReformatory.weight(brian);
        eastHelsinkiReformatory.weight(brian);
        eastHelsinkiReformatory.weight(brian);

        System.out.println("total weights measured "+eastHelsinkiReformatory.totalWeightsMeasured());
    }
}

Answer 1

诀窍是使用尚未使用的现有实例变量权重作为计数器。

public class Reformatory
{
    private int weight;

    public int weight(Person person)
    {
        int weight = person.getWeight();

        this.weight++;

        // return the weight of the person
        return weight;
    }
    public void feed(Person person)
    {
        //that increases the weight of its parameter by one.
        person.setWeight(person.getWeight() + 1);

    }
    public int totalWeightsMeasured()
    {
        return weight;
    }

}