error initializing hashmap

[leroy tsruya]

Hi all!
i keep getting errors for this line:

   
HashMap<T,S>  hmap = new HashMap<String, S>();
 

it says that it doesnt find Classes T and S

but these are wildcards...

Thanks!

[Henry Wong]

Wildcards are specified with a "?" question mark. You can also bound it with "extends" and "super", but even then, you need to specify with a "?".

Henry

[Shashank Rudra]

this is not how we create generic while declaring reference variables. That is when we are defining generics for classes and methods. For defining reference variables Generic in nature instead we use <?>, <? extends> and <? super>. That depends on what is our need. Those details can be found in Core java books. I would prefer to look into Kathie's book.

[leroy tsruya]

Thank you guys, i figured my mistake.
Thanks!