Can We Override Final Method?

Can we call final method in Java?

We can declare a method as final, once you declare a method final it cannot be overridden.

So, you cannot modify a final method from a sub class.

The main intention of making a method final would be that the content of the method should not be changed by any outsider..

What happens if we make constructor private?

Private constructors are used to prevent creating instances of a class when there are no instance fields or methods, such as the Math class, or when a method is called to obtain an instance of a class. If all the methods in the class are static, consider making the complete class static.

Can we overload final method?

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.

Can we override main method?

The short answer to, can we overload the main method in Java is Yes, you can overloading, nothing stops from overloading, but JVM will always call the original main method, it will never call your overloaded main method. … the answer is No because main is a static method and static method cannot be overridden in Java.

Why we Cannot override static method?

Static methods cannot be overridden because they are not dispatched on the object instance at runtime. The compiler decides which method gets called. Static methods can be overloaded (meaning that you can have the same method name for several methods as long as they have different parameter types).

Can we inherit private method in Java?

Yes. A java private member cannot be inherited as it is available only to the declared java class. Since the private members cannot be inherited, there is no place for discussion on java runtime overloading or java overriding (polymorphism) features.

Are private methods final?

When we use final specifier with a method, the method cannot be overridden in any of the inheriting classes. Methods are made final due to design reasons. Since private methods are inaccessible, they are implicitly final in Java. So adding final specifier to a private method doesn’t add any value.

Can we inherit final class?

The final modifier for finalizing the implementations of classes, methods, and variables. The main purpose of using a class being declared as final is to prevent the class from being subclassed. If a class is marked as final then no class can inherit any feature from the final class. You cannot extend a final class.

Is method overloading good?

4 Answers. Overloading has no impact on performance; it’s resolved by the compiler at compile-time. If you’re using C# 4.0 you can save your fingers some work and use optional parameters. Performance impact, as far as I know, it’s like defining a new method.

Can we execute a class without a main method?

Yes You can compile and execute without main method By using static block. But after static block executed (printed) you will get an error saying no main method found. And Latest INFO –> YOU cant Do this with JAVA 7 version.

What is the difference between override and overload?

Overloading occurs when two or more methods in one class have the same method name but different parameters. Overriding means having two methods with the same method name and parameters (i.e., method signature). One of the methods is in the parent class and the other is in the child class.

Can constructor be private?

Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.

Can we mock final methods using Mockito?

There is no support for mocking final methods in Mockito. A comparison between Mockito and PowerMock will explain things in detail. Cannot mock final methods – their real behavior is executed without any exception. Mockito cannot warn you about mocking final methods so be vigilant.

What happens if we override final method?

Any method that is declared as final in the superclass cannot be overridden by a subclass. If we try to override the final method of super class we will get an error in Java.

Can we override private method?

No, a private method cannot be overridden since it is not visible from any other class. You have declared a new method for your subclass that has no relation to the superclass method. One way to look at it is to ask yourself whether it would be legal to write super. func() in the Derived class.

Is final and Cannot be overridden?

A final method in a superclass cannot be overridden in a subclass—this guarantees that the final method implementation will be used by all direct and indirect subclasses in the hierarchy. Methods that are declared private are implicitly final , because it’s not possible to override them in a subclass.

Can we override constructor?

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. Overriding means what we have declared in Super class, that exactly we have to declare in Sub class it is called Overriding.

Does return type matter in overriding?

The return type must be the same as, or a subtype of, the return type declared in the original overridden method in the superclass. Yes. It is possible for overridden methods to have different return type .