相关疑难解决方法(0)

我正在研究单身人士,我开发了一个非常基本的单身人士课程.

public class SingletonObject {
    private static SingletonObject ref;
    private SingletonObject () //private constructor
    { }

    public  static synchronized   SingletonObject getSingletonObject()
    {
        if (ref == null)
            ref = new SingletonObject();
                return ref;
        }


    public Object clone() throws CloneNotSupportedException
    {throw new CloneNotSupportedException ();
    }   
}

现在下面是我破解单身人士的一种方式..

public class CrackingSingleton {

     public static void main(String[] args) throws ClassNotFoundException,
       IllegalArgumentException, SecurityException,
       InstantiationException, IllegalAccessException,
       InvocationTargetException {

        //First statement retrieves the Constructor object for private constructor of SimpleSingleton class.
        Constructor pvtConstructor = Class.forName("CrackingSingleton.SingletonObject").getDeclaredConstructors()[0];
        //Since the …