Specifying a generic type in java from Class object

Why this is wrong:

    Class<? extends Number> type = Integer.class;
    ArrayList<type> = new ArrayList<>();

?

Is there no way to instantiate a class of a specific type given a class object?

Obviously I would never do that directly, that is just an example to show what is needed. In the actual code I need I don't know the name of the type. For example

    public void createAList(Class<? extends Number> type)  
{
    ArrayList<type> toReturn = new ArrayList<>();
    return toReturn;
}