Generics and forName()

If I have this class:

  class A {
    public A(String a);
  }

Is it possible to make an instance through reflection without getting a
compiler warning (java 1.5)?

The following gives an unchecked warning in the first line due to the
forced cast. Using "?" just postpone the the problem:

  Class<A> clazz = (Class<A>) Class.forName("A");
  Constructor<A> ctor = clazz.getConstructor(String.class);
  A a = ctor.newInstance("hello world");

The problem is that in my organization we treat warnings as errors and
the above simply isn't doable within such a regime.

What is the workaround?

(And why whould all the above be possible (by Class<?> and Class.newInstance()),
if just the constructor didn't take any arguments?)

Thanks!

.

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