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staticメソッドのオーバーライド

Last updated at Posted at 2016-06-17

staticメソッドはクラス固有のものであるためオーバーライドができない(下記例)。

public class Main {
    public static void main(String[] args) {
        Parent obj = new Child();
        obj.hoge();
        obj.piyo();
    }
}

class Parent {
    public static void hoge() {
        System.out.println("parent");
    }

    public void piyo() {
        System.out.println("parent");
    }
}

class Child extends Parent {
    // もちろん@Overrideアノテーションを付けるとコンパイルエラー
    public static void hoge() {
        System.out.println("child");
    }

    @Override
    public void piyo() {
        System.out.println("child");
    }
}
# 実行結果
parent
child
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