Reflection and Generic Collections

Question

Hi -
I'm having trouble with reflection on Sets
I have a set of type T extends U and want to return the class of T:
public static <T extends U> Class<T> getSetType(Set<T> set) {
// what to do?
}Any help?
Message was edited by:
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Answer 1

parameterized types are not present at runtime, as danny basically indicated. what you want to do here is neither a generics nor a reflection issue: unless the Set is empty, you can just examine the first object it contains for it's class:
public static <T extends U> Class<T> getSetType(Set<T> set) {
     if ( null == set ) {
        return null;
     if ( 0 == set.size() ) {
        return null;
     return set.iterator().next().getClass();
}