java - 构造函数泛型问题

Question

我正在制作一个基于文本的小游戏，只是为了好玩，我正在摆弄泛型并遇到了问题。

我有一个可装备的类(class):

public class Equippable extends Item
{
    double mDurability; 

    public Equippable(String name, double weight, double durability)
    {
        super(name, weight);
        mDurability = durability;
    }//Equippable

    //Getters
    public double getDurability(){return mDurability;}

    //Setters
    public void setDurability(double Durability){mDurability = Durability;} 
}//Equippable

我有一个名为 BodyPart 的类的构造函数，我想接受 Equippable 的任何子类作为参数:

public BodyPart(String name,  Class<? extends Equippable> equipClass)
{
    mName         = name;
    mEquipClass   = equipClass;
}//BodyPart

Equippable 有一个子类 Armor。

public class Armor extends Equippable
{
    double mArmorRating;

    public Armor(String name, double weight, double durability, double armorrating) 
    {
        super(name, weight, durability);
        mArmorRating = armorrating;
    }//Armor
}//Armor

最后，我有几个扩展 Armor.class 的类。我不会将它们全部发布，因为除了类名称之外，它们此时都是相同的。

public class HumanoidBodyArmor extends Armor
{

    public HumanoidBodyArmor(String name, double weight, double durability, double armorrating) 
    {
        super(name, weight, durability, armorrating);
    }//HumanoidBodyArmor
}//HumanHeadArmor

当我这样做时:

BodyPart bp = new BodyPart("Head"  , Armor.class));

一切都很好，并且对象已创建。然而当我这样做时

BodyPart bp = new BodyPart("Head"  , HumanHeadArmor.class));

Eclipse 勃然大怒并说道

The constructor BodyPart(String, Class<HumanoidHeadArmor>) is undefined

我非常确定这会起作用，但显然我错过了一些东西。有人可以阐明这个主题吗？

我这样做只是为了理智

Equippable.class.isAssignableFrom(HumanoidHeadArmor.class) 

它确实评估为 true。

编辑根据评论中的要求，这里是 HumanoidBodyArmor 类

public class HumanoidBodyArmor extends Armor
{

    public HumanoidBodyArmor(String name, double weight, double durability, double armorrating) 
    {
        super(name, weight, durability, armorrating);
    }//HumanoidBodyArmor
}//HumanoidBodyArmor

头甲/ body 甲/足甲之间没有区别。除了名字之外，它们都是相同的。只是具有相同构造函数的空类，仅调用其父级 (Armor) 构造函数。

Answer 1

这对我来说一切正常 - 我怀疑你有一些命名问题。

class Item {

    public Item(String name, double weight) {

    }
}

public class Equippable extends Item {

    double mDurability;

    public Equippable(String name, double weight, double durability) {
        super(name, weight);
        mDurability = durability;
    }

    //Getters
    public double getDurability() {
        return mDurability;
    }

    //Setters
    public void setDurability(double Durability) {
        mDurability = Durability;
    }
}

class BodyPart {

    String name;
    Class<? extends Equippable> equipClass;

    public BodyPart(String name, Class<? extends Equippable> equipClass) {
        this.name = name;
        this.equipClass = equipClass;
    }
}

public class Armor extends Equippable {

    double mArmorRating;

    public Armor(String name, double weight, double durability, double armorrating) {
        super(name, weight, durability);
        mArmorRating = armorrating;
    }
}

public class HumanoidBodyArmor extends Armor {

    public HumanoidBodyArmor(String name, double weight, double durability, double armorrating) {
        super(name, weight, durability, armorrating);
    }
}

public void test() {
    BodyPart head = new BodyPart("Head", Armor.class);
    BodyPart body = new BodyPart("Body", HumanoidBodyArmor.class);
}