Processing HashMap 1

[tvrtko]

I have some data stored in HashMap and I need to achieve serial access to that data. With HashSet, for instance, I would use iterator. But how to do this with HashMap?

Thansks in advance.

 

[feherke]

Hi

I use [tt]HashMap.entrySet()[/tt] for this purpose, that has an [tt]Iterator[/tt] :

HashMap hm=new HashMap();
Iterator hmi=hm.entrySet().iterator();
Map.Entry me;

while (hmi.hasNext()) {
  me=(Map.Entry)hmi.next();
  System.out.println(me.getKey()+" : "+me.getValue());
}

( Question to the gurus : is a better way to do this then the above ? )

Feherke.

http://rootshell.be/~feherke/

 

[tvrtko]

Thanks!

 

[Diancecht]

Well, depending on what you're trying to do, HashMap ha two more methods: keySet that returns the keys and values that returns a Collection.

Cheers,
Dian

 

[tvrtko]

Is it possible to iterate Set in some order - ascending or descending?