You can’t call an abstract class constructor with a class instance creation expression , i.e. As constructors of abstract classes can only be called within subclass constructors (and by chaining one to another within the same class), I typically make them protected … making them public would serve no purpose.19 Haz 2014
Read moreAre constructor of abstract class private?
Answer: Yes. Constructors in Java can be private . All classes including abstract classes can have private constructors. Using private constructors we can prevent the class from being instantiated or we can limit the number of objects of that class.
Read moreCan we Autowire a class?
@Autowired by Type By default, Spring does auto-wire by type . we have a class type UserDao and it’s an implementation of IUserDao interface.
Read moreCan we overwrite abstract class?
you can override both abstract and normal methods inside an abstract class . only methods declared as final cannot be overridden.
Read moreWhy can’t you instantiate an abstract class?
Abstract class, we have heard that abstract class are classes which can have abstract methods and it can’t be instantiated. We cannot instantiate an abstract class in Java because it is abstract, it is not complete, hence it cannot be used .
Read moreCan you instantiate an abstract class directly?
Abstract classes cannot be instantiated , but they can be subclassed. When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class.
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