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.

代码的输出应为0,2,6. (编辑//我之前在这里0,4,但输出应该是0,6)

但我只是不知道你怎么能计算它,我试图谷歌和一切,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：

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());
    }
}