final HashMap hm=new HashMap();

[sangramkeshari.jena]

final HashMap hm=new HashMap();
public void show()
{
hm.put("name",value);
}
in this prg here the final hashtable value can be changed in
put method,its the prg run?

If run why?

[sunde887]

The reference is final, not the underlying storage. Making the hashmap final doesn't make it unmodifiable, instead it makes it so you can't re-assign the variable to a new hashmap. If you did

hm = new HashMap();

In the show method you would run into problems.

The hashmap itself is a mutable object; the reference to it is final.

There are methods on the map class to get an unmodifiable view of the hashmap, check the API.

Jos beat me to it while editing my post to add the api

[JosAH]

Also, read the API documentation for the Collections utility class if you want an unmodifiable Map.

kind regards,

Jos

[Norm]

Interesting concept: unmodifiable Map.
Or is that after putting something in it?

[JosAH]

Interesting concept: unmodifiable Map.
Or is that after putting something in it?

No, you can only make an empty Map unmodifiable ;-)

kind regards,

Jos (<--- silly ;-)