How do I get the `.class` attribute from a generic type parameter?

Question

The accepted answer to this question describes how to create an instance of T in the Generic class. This involves passing in a Class<

Answer 1

W may not be available due to type erasure. You should require that a Class is passed into the method. You get a class object and its generic ensures that only W and no subclass is passed in, due to covariance.

public InputField(String labelText, Class cls)
{
    super(new String[] {labelText}, cls);
}

will take W.class but not WSubtype.class.