Avoiding unchecked warning

Hello eveyone. I'm relatively new on generics, and I'm curious about something. Consider this code:

...

Vector v = u.getDataVector();

for (Object elem : v){

Vector<String> st = (Vector<String>)elem;

if(Long.valueOf(st.elementAt(0)) == c.getId()){

// Do your things.

return;

}

}

It works just fine. v is a Vector made of Vector<String> items. Running it produces no problem whatsoever. But NetBeans keeps complaining that:

warning: [unchecked] unchecked cast

found: java.lang.Object

required: java.util.Vector<java.lang.String>

Vector<String> st = (Vector<String>)elem;

1 warning

If I change the loop with:

for (Vector<String> elem : v){

I get incompatible type (Object vs Vector<String>) error instead.

Now the question is: is there any "right" way to avoid the warking message?

Thanks in advance!

Fabio.

Message was edited by:

FabioFranchello

[1345 byte] By [FabioFranchelloa] at [2007-11-27 9:34:03]