How to avoid "unchecked cast" warnings

Question

Hi all,
here is my code:
private Vector<String> vector1;
private Vector<String> vector2=new Vector<String>();
vector1=(Vector<String>)vector2.clone();
...How can i avoid "unchecked cast" warnings, while compiling with "-Xlint:unchecked" option.

Answer 1

I'd also add that you should think about the following idioms:
1. Ask yourself do I really need a synchronized structure? The answer might be that unsynchronized structure like ArrayList might be more appropriate. If you DO need a concurrent structure then you may find high-performance one in java.util.concurrent package.
2. Using interfaces will be more appropriate in the long run:
List<String> l = new ArrayList<String>(); because you can replace the implementation of the specific interface with more appropriate structure just on one place.
Best regards,
Andrej