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Message:

Where r the methods of the enumeration interface

Posted by Minaz on January 09, 2001 at 10:25 AM

> > > Hi Saddy
> > > Please send me the program you are talking about. There are things in Java which is not permitted if we , the programmer , do it but in internally they are. For example the two modifiers "abstract" and "final" cannot be used with a class. But when you declare an array of int ( in fact for any array ) like
> > > int[] arr = new int[50] ;
> > > now when you try to find the class of arr in it is
> > > public abstract final [I ...

> > > So, you may be right if the program you are referring to has been written by the creator of Java themselves...

> > > Thanx
> > > Kishori

> > Hi Kishori,
> > here is the program that i was talking about

> >
> > class vectors{
> > public static void main(String args[])
> > {
> > Vector a = new Vector();
> >
> > a.addElement(new String("Hello"));
> > a.addElement(new String(" to"));
> > a.addElement(new String(" this"));
> > a.addElement(new String(" World"));
> >
> > Enumeration vEnum = a.elements();
> > while(vEnum.hasMoreElements())
> > {
> > System.out.print(vEnum.nextElement());
> > }
> > }
> > }

> > Here hasMoreElements() and nextElement() both of Enumeration interface are used without overriding them, how is it working?
> > i will be thankful if u could clear my doubt

> > saddy

>
> Your doubt is very good ...
> Vector object . elements() returns an object of a class which is implementing the interface Enumeration...
> i hope u already know that an interface can hold an object reference of its subclass so that happened here ....
> but the name of the subclass of that interface Enumeration is not disclosed...

> so that's it u can mail me if u have any doubts...
> bye

> Spidy...

U er answer is very convincing. But does the enumeration interface has its own methods & if so in the above code of vector class where r we overriding it.