抽象类的子类的Java构造函数

Question

我开始开发我的第一个Java项目，这是一种基本的角色扮演游戏。 我想创建一个角色。

首先，我将解释一些事情：

• Game类-获取角色类输入（例如Fighter）。
• Character -具有所有字符数据。
• CharacterClass抽象类，其中包含每个字符类的信息（例如Fighter ）。
• Fighter （和其他类）扩展了抽象类CharacterClass ，应为所选角色类（如Fighter ）设置初始统计信息。

我想做的是在Game选择一个角色类（假设我选择Fighter ），并通过displayStats获取所有统计信息。 当角色选择一个类别时， Game应调用以下内容： Chracter ch = new Character(name, scan) ，然后ch.displayCharacter 。

我的问题是Fighter的构造函数并将此数据分配给Character的构造函数。

public class Game {
public static void main(String[] args) {

    System.out.println("Choose a character: ");
    System.out.println("1. Fighter");
    System.out.println("2. Rogue");
    System.out.println("3. Mage");
    System.out.println("4. Cleric");


    Scanner sc = new Scanner(System.in);
    int scan = sc.nextInt();
    System.out.println("Character Class: " + CharacterUtil.getCharacterClass(scan));

    System.out.println("Choose Name:");
    Scanner nameIn = new Scanner(System.in);
    String name = nameIn.next();
    System.out.println("Name: " + name);

}
}


public class Character {

private String name;
private String characterClass;
private int level;
private int hp;
private int currentHp;
private long xp;
/*private int BAB; /*Base attack bonus*/

private int strength;
private int constitution;
private int dexterity;
private int intelligence;
private int wisdom;
private int charisma;

Character(String name, String chracterClass){

    this.name = name;
    this.characterClass = chracterClass;
    level =  ;
    hp = ;
    currentHp = hp;
    xp = 0;
    strength = ;
    constitution = ;
    dexterity = ;
    intelligence = ;
    wisdom = ;
    charisma = ;


}


void displayCharacter(){
    System.out.println("Name: " + name);
    System.out.println("Level: " + level);
    System.out.println("Class: " + characterClass);
    System.out.println("HP: " + hp);
    System.out.println("Attributes: ");
    System.out.println("Strength: " + strength);
    System.out.println("Constitution: " + constitution);
    System.out.println("Dexterity: " + dexterity);
    System.out.println("Intelligence: " + intelligence);
    System.out.println("Wisdom: " + wisdom);
    System.out.println("Charisma: " + strength);
    System.out.println("XP: " + xp);

}

}

---

abstract class CharacterClass {

private int level;
private int hp;

private int strength;
private int constitution;
private int dexterity;
private int intelligence;
private int wisdom;
private int charisma;

CharacterClass(){

    level = 1;
    hp = 10;
    strength = 10;
    constitution = 10;
    dexterity = 10;
    intelligence = 10;
    wisdom = 10;
    charisma = 10;
}

---

class Fighter extends CharacterClass {

Fighter(){
    super.level = 1;
    super.hp = 10;
    super.strength = 16;
    super.constitution = 14;
    super.dexterity = 14;
    super.intelligence = 10;
    super.wisdom= 10;
    super.charisma = 10;
}
}

Answer 1

可以使CharacterClass私有字段受保护，而不是私有字段，以便子类可以访问它们，或者在抽象类中实现getter / setter并将其用于子类构造函数。

同样，super.field并不代表任何含义：您正在实例化一个对象，该对象将具有抽象类和子类中的字段，您要访问的将是this.fields。

样例代码：

public abstract class CharacterClass {

    private int intelligence;
    private int strength;
    private int dexterity;
    private int vitality;

    protected CharacterClass() {
        setIntelligence(10);
        setStrength(10);
        setDexterity(10);
        setVitality(10);
    }

    public int getDexterity() {
        return dexterity;
    }
    protected void setDexterity(int dexterity) {
        this.dexterity = dexterity;
    }
    public int getVitality() {
        return vitality;
    }
    protected void setVitality(int vitality) {
        this.vitality = vitality;
    }
    public int getStrength() {
        return strength;
    }
    protected void setStrength(int strength) {
        this.strength = strength;
    }
    public int getIntelligence() {
        return intelligence;
    }
    protected void setIntelligence(int intelligence) {
        this.intelligence = intelligence;
    }

}

---

public class Fighter extends CharacterClass {

    public Fighter() {
        setStrength(15);
        setVitality(15);
    }

}

---

public class Main {

    public static void main(String[] args) {
        CharacterClass player = new Fighter();

        System.out.println(player.getStrength());
        System.out.println(player.getIntelligence());
    }

}

这将打印15，然后打印10，因为强度已被figther修改，但是智能仍然是CharacterClass中定义的智能。

请注意，您可能希望玩家不只是CharacterClass或Figther。 尽管您将有很多Figther，Rogues和Mages作为PNJ，但玩家将拥有其他可能性，例如将物品存储在库存中，与世界互动等。

祝您比赛顺利！