我如何实例化一个具有私有构造函数的类

public class Singleton {
    private static Singleton instance;

    private Singleton() {
        // 私有构造函数
    }

    public static Singleton getInstance() {
        if (instance == null) {
            instance = new Singleton();
        }
        return instance;
    }
}

import java.lang.reflect.Constructor;

public class Main {
    public static void main(String[] args) throws Exception {
        Constructor<Singleton> constructor = Singleton.class.getDeclaredConstructor();
        constructor.setAccessible(true);
        Singleton singleton = constructor.newInstance();
    }
}

public class MyClassFactory {
    public static MyClass createInstance() {
        return new MyClass();
    }
}

public class MyClass {
    private MyClass() {
        // 私有构造函数
    }
}