Can a constructor be private and how are this () and super () method used with constructor?

Yes, a constructor can be private .

super keyword is used to access methods of the parent class while this is used to access methods of the current class . this is a reserved keyword in java i.e, we can’t use it as an identifier. this is used to refer current-class’s instance as well as static members.

both this() and super() can not be used together in constructor . this() is used to call default constructor of same class.it should be first statement inside constructor.

The super keyword is used to call the constructor of its parent class to access the parent’s properties and methods .