D features

[Rishat Galiulin]

I'm newbie to D, but I've been wondered by its features.

I have some questions about D2 and its standard library :
1) Why is "Object.factory(string classname)" not allowing to create objects without default constructor, for example:
     ubyte[] array = new ubyte[10];
     MyClass my = Object.factory("MyClass",  array);
2) Why D not using functions exceptions specification list like Java? If this promotes bad programming style to newbies, may be better at least to create compilation warnings?

With best regards, Rishat Galiulin.