constructor is a special kind of method , you can specify an access specifier[what are all applicable to a method] to a constructor. so you can not access the *particular* constructor of that class[say class A] from other class[say class A]. and if you want to instantiate A from B then, provide a public method[Factory method] in A which create an object of A[private scope is available inside a class], and access the method from class B. this technique is useful in some core design
pattern like singleton pattern, strategy pattern etc...
hth