Quick Answer: Can Final Method Be Extended?

What happens if we override final method?

The final method can’t be overridden.

A final method declared in the Parent class cannot be overridden by a child class.

If we try to override the final method, the compiler will throw an exception at compile time..

Can we prevent overriding a method without using the final modifier?

In short, its not possible to override private and static method in Java. That’s all about 3 ways to prevent a method from being overridden in Java. Remember, though syntactically you can use private, static and final modifier to prevent method overriding, but you should always use final modifier to prevent overriding.

Which method Cannot be overridden?

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. A subclass within the same package as the instance’s superclass can override any superclass method that is not declared private or final.

Can private class be inherited?

Private Members in a Superclass A subclass does not inherit the private members of its parent class. However, if the superclass has public or protected methods for accessing its private fields, these can also be used by the subclass.

Can we inherit a class with private constructor?

If class with private constructor and sealed class cannot be inherited , then what is the use of class which cannot be inherited. … And as said previously private constructor can be excused as we have static classes now. So private constructor + sealed means pure static class. Also sealed class cannot be inherited.

Can private methods be inherited?

You can only call a private member method in its definition class. … say() because derived classes can’t inherit private methods from its base class. Only protected and public methods/variables can be inherited and/or overridden.

Can a final method be inherited?

No, we cannot override a final method in Java.

Can a constructor be final?

No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. … In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors.

Can you extend a final defined class in PHP?

PHP 5 introduces the final keyword, which prevents child classes from overriding a method by prefixing the definition with final. If the class itself is being defined final then it cannot be extended. Note: Properties and constants cannot be declared final, only classes and methods may be declared as final.

Can we overload private and final methods?

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 different while doing method overloading.

Can you allow class to be inherited but prevent the method from being overridden?

In a base class, the sealed keyword is only used to prevent a class from being derived, but in inherited classes it can be used to prevent another inherited class from overriding the method. To prevent a base class method from being overridden, just do not specify it as virtual.

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 constructor be extended?

A class can have multiple constructors, and each constructor can have its own access modifier.

Can a constructor be static?

A static constructor does not take access modifiers or have parameters. A class or struct can only have one static constructor. Static constructors cannot be inherited or overloaded. A static constructor cannot be called directly and is only meant to be called by the common language runtime (CLR).

Can a private class be extended?

The answer is you can’t extend the Parent class if it has a private default constructor. You have to make the constructor available to the subclass. In this case you need to have a default constructor that have a protected or public or default access modifier.

Which class can not be extended?

The final modifier When used on a class declaration, it means that the class cannot be extended. (i.e. it cannot become a parent class to a new subclass) When used on a method declaration, it means that the method cannot be overridden in a subclass.

Can we override private and final methods?

No, We can not override private method in Java, just like we can not override static method in Java. … private methods are not even visible to Child class, they are only visible and accessible in the class on which they are declared. private keyword provides highest level of Encapsulation in Java.

How do you extend more than one class?

Java does not support multiple inheritance, that’s why you can’t extend a class from two different classes at the same time. Rather, use a single class to extend from, and use interfaces to include additional functionality.