java - 在 Java 中扩展类

Question

我正在尝试将一个类扩展到多个其他类，例如

public class Ability extends Character

因此，我的代码中出现错误:

Implicit super constructor Character() is undefined. Must explicitly invoke another constructor Defense.java

我的代码是:

public class Character {
    int characterID;
    double characterHealth;

    public Character(int charID, double charHealth) {
        characterID = charID;
        characterHealth = charHealth;
    }
}

public class Defense extends Character {
    int armorClass;
    int difficultyClass;

    public Defense(int newAC, int newDC){
        armorClass = newAC;
        difficultyClass = newDC;
    }
}

我不确定如何调用另一个构造函数。如果有人能指出原因以及如何做到这一点。

Answer 1

来自子类ctor:

super(charId, charHealth);

由于父类(super class)没有默认构造函数，因此您必须显式调用非默认构造函数。