Proxy.newProxyInstance is a little cumbersome to use because

1. Most of the time, you are only proxying to one interface, so you need to construct a one-element Class[].

2. You need to then cast the result.

Suggest a simple overload which would handle the common cases in a more type-safe way:

public static <T> T newProxyInstance(ClassLoader, Class<T>, InvocationHandler)