Java filter list to generic type T

What should I do (without compiling):

<T> List<T> getElementsOf() {
    return list.stream()
            .filter(x -> x instanceof T)
            .map(x -> (T) x)
            .collect(toList());
}

What are examples of usage? Ideally, it should look like obj< Derived> getElementsOf().

Solution

Although another answer almost completes the work, here is a better answer:

<T> List<T> getElementsOf(Class<T> clazz) {
    return list.stream()
            .filter(clazz::isinstance)
            .map(clazz::cast)
            .collect(toList());
}

Notice clazz:: isinstance thingy Instead of comparing two classes, it uses the isinstance method According to the documentation, this is equivalent to instanceof, which is the first one you want