初期化ブロックと継承の挙動の調査

Derived.java

public class Derived extends Base {
    public String a = "initial";
    public String b;

    public static void main(String[] args) {
        System.out.println("a: " + new Derived().a);
        System.out.println("b: " + new Derived().b);
    }
}

class Base {
    public Base() {
        try {
            getClass().getField("a").set(this, "updated");
            getClass().getField("b").set(this, "updated");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}