The easiest way to transform collection to array?

Question

Suppose we have a Collection. What is the best (shortest in LoC in current context) way to transform it to Foo[]? Any well-known

Answer 1

Here's the final solution for the case in update section (with the help of Google Collections):

Collections2.transform (fooCollection, new Function() {
    public Bar apply (Foo foo) {
        return new Bar (foo);
    }
}).toArray (new Bar[fooCollection.size()]);

But, the key approach here was mentioned in the doublep's answer (I forgot for toArray method).