Answer 1

In simple words, a constructor cannot be inherited, since in subclasses it has a different name (the name of the subclass).

class A {
A();
}

class B extends A{
B();
}
You can do only:

B b = new B(); // and not new A()
Methods, instead, are inherited with "the same name" and can be used.

As for the reason: It would not have much sense to inherit a constructor, since constructor of class A means creating an object of type A, and constructor of class B means creating an object of class B.

You can still use constructors from A inside B's implementation though:

class B extends A{
B() { super(); }
}