If subclass (child class) has the same method as declared in the parent class, it is known as method overriding in Java. In other words, If a subclass provides the specific implementation of the method that has been declared by one of its parent class, it is known as method overriding.
What is overriding rules in Java?
Instance methods can be overridden only if they are inherited by the subclass. … A method declared final cannot be overridden. A method declared static cannot be overridden but can be re-declared. If a method cannot be inherited, then it cannot be overridden.
How overriding can be avoided in Java?
The final way of preventing overriding is by using the final keyword in your method. The final keyword puts a stop to being an inheritance. Hence, if a method is made final it will be considered final implementation and no other class can override the behavior.
Why do we use overriding?
The benefit of overriding is: ability to define a behavior that’s specific to the subclass type, which means a subclass can implement a parent class method based on its requirement. In object-oriented terms, overriding means to override the functionality of an existing method.
Can we override final method in Java?
No, the Methods that are declared as final cannot be Overridden or hidden.
Can we overload and override the main method?
Yes, We can overload the main method in java but JVM only calls the original main method, it will never call our overloaded main method.
Is overriding and overloading both static polymorphism?
Method overloading is an example of static polymorphism, while method overriding is an example of dynamic polymorphism. An important example of polymorphism is how a parent class refers to a child class object.
Is finalize method must be declared protected?
The finalize() method is not public because it should only be invoked by JVM and not by anyone else and protected so that it can be overridden by the subclasses.
Is a relationship in Java?
In Java, an Is-A relationship depends on inheritance. Further inheritance is of two types, class inheritance and interface inheritance. … When there is an extends or implement keyword in the class declaration in Java, then the specific class is said to be following the Is-A relationship.
Can we override constructor in Java?
It is never possible. Constructor Overriding is never possible in Java. This is because, Constructor looks like a method but name should be as class name and no return value.
What is Java encapsulation?
Encapsulation in Java is a mechanism of wrapping the data (variables) and code acting on the data (methods) together as a single unit. In encapsulation, the variables of a class will be hidden from other classes, and can be accessed only through the methods of their current class.
Can we override abstract method?
E. Abstract methods cannot be overridden by a concrete subclass.
Can final methods be overloaded?
private and final methods can be overloaded but they cannot be overridden. It means a class can have more than one private/final methods of same name but a child class cannot override the private/final methods of their base class. … Argument list should be same in method Overriding.
Can constructor be private?
Yes. Class can have private constructor. Even abstract class can have private constructor. By making constructor private, we prevent the class from being instantiated as well as subclassing of that class.