Singleton - Whether Cloneable overrides Singleton

Hi all,

public class ChummaEx implements Cloneable
{
    private static ChummaEx moin = null;
    private String mName = null;
    private ChummaEx()
    {}

    public static ChummaEx getInstance()
    {
        if(moin == null)
        {
            createInstance();
        }
        return moin;
    }

    private static void createInstance()
    {
        if(moin == null)
        {
            moin = new ChummaEx();
        }
    }

    public void setName(String name)
    {
        mName = name;
    }

    public String getName()
    {
        return mName;
    }

    public static void main(String args[])
    {
        try
        {
         ChummaEx m1 = ChummaEx.getInstance();
         ChummaEx m2 = (ChummaEx)m1.clone();
            System.out.println(System.identityHashCode(m1));
            System.out.println(System.identityHashCode(m2));
            m1.setName("Moin");

            System.out.println(m2.getName());
            System.out.println(m1.getName());
        }
        catch(CloneNotSupportedException e)
        {
            System.out.println("In Catch");
            e.printStackTrace();
        }
    }
}

Output :

11394033
4384790
null
Moin

SIngleton has the functionality to create only instance...I was trying
to beak the singleton behavior and after a long research i achieved it
by using the Cloneable interface...

My Questions are:
1. Whether the singleton behavior is overriden by the Cloneable
behavior
2. By implementing the Cloneable interface, how to retain the
Singleton behavior...
3. I tried to use the final key at some place to retain the singleton
behavior....but i failed.
4. Some group mates might have a question in their mind, why i have
used the Cloneable interface....as i already told, i was doing some
research over the singleton...

Kindly help me in this regard
Thanks
Moin