抽象类

Question

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

首先我会解释一些事情：

• Game class - 获取字符类输入（如战斗机）。
• Character - 包含所有角色数据。
• CharacterClass - 包含每个字符类信息的抽象类（如Fighter）。
• Fighter（以及其他类）扩展抽象类CharacterClass，应为所选字符类设置初始统计信息（如Fighter）。

我想要做的是在Game中选择一个角色类（假设我选择Fighter），并按displayStats获取所有统计数据。当角色选择一个班级时，Game应该调用类似：Chracter ch = new Character(name, scan)，然后ch.displayCharacter的内容。

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

使您的CharacterClass私有字段受保护而不是私有，因此可以通过子类访问它们或在抽象类中实现getter / setter并在子类构造函数中使用它们。

super.field也没有任何意义：你正在实现一个对象，它将包含抽象类和子类中的字段，它将是你要访问的this.fields。

示例代码：

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后跟10，因为强度已被figther修改，但智能仍然是CharacterClass中定义的。

请注意，您可能希望您的播放器不仅仅是一个CharacterClass或Figther。虽然你会有很多Figther，Rogues和Mages作为PNJ，玩家将拥有其他各种可能性，例如在他的库存中存储物品，与世界互动等等。

祝你好运！