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Java superキーワード

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1,superキーワードとは

スーパークラス(親クラス)のオブジェクトを参照するキーワードです。

2,ソースコード

Main.java
public class Main {

    public static void main(String[] args) {

        // super = keyword refers to the superclass (parent) of an object
        //         very similar to the "this" keyword

        Hero hero1 = new Hero("Batman", 42, "$$$");
        Hero hero2 = new Hero("Superman", 43, "everything");

        System.out.println(hero1.name);
        System.out.println(hero1.age);
        System.out.println(hero1.power);

        System.out.println(hero2.toString());

    }

}

Personクラス(スーパークラス)👇

Person.java
public class Person {

    String name;
    int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String toString() {
        return this.name + "\n" + this.age + "\n";
    }

}

Personクラスを継承しているHeroクラス👇

Hero.java
public class Hero extends Person {

    String power;

    public Hero(String name, int age, String power) {
        super(name, age);

        this.power = power;
    }

    public String toString() {
        return super.toString() + this.power;
    }
}
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