Java如何使用超类构造函数设置子类实例变量

class SuperClass {
    private int superVariable;

    public SuperClass(int value) {
        this.superVariable = value;
    }

    public int getSuperVariable() {
        return superVariable;
    }
}

class SubClass extends SuperClass {
    private int subVariable;

    public SubClass(int superValue, int subValue) {
        super(superValue); // 调用超类的构造函数
        this.subVariable = subValue;
    }

    public int getSubVariable() {
        return subVariable;
    }
}

public class Main {
    public static void main(String[] args) {
        SubClass sub = new SubClass(10, 20);
        System.out.println("Super Variable: " + sub.getSuperVariable());
        System.out.println("Sub Variable: " + sub.getSubVariable());
    }
}