Can you override protected method?

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Yes, the protected method of a superclass can be overridden by a subclass. If the superclass method is protected, the subclass overridden method can have protected or public (but not default or private) which means the subclass overridden method can not have a weaker access specifier.

Which methods Cannot be override?

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.

Are protected methods Final in inheritance?

1) Private methods are final. 2) Protected members are accessible within a package and inherited classes outside the package. 3) Protected methods are final.

Can we override protected method in PHP?

The problem isn’t that you cannot override the protected method, it’s that you are calling a protected method from outside of the class. After the class is instantiated, you can call a public method which in turn could call get_name() and you will see that the code will work as expected.

Can we override public method as private?

No, we cannot override private or static methods in Java.

Can we override static method?

No, we cannot override static methods because method overriding is based on dynamic binding at runtime and the static methods are bonded using static binding at compile time. So, we cannot override static methods. The calling of method depends upon the type of object that calls the static method.

Can we override the overloaded method?

So can you override an overloaded function? Yes, since the overloaded method is a completely different method in the eyes of the compiler.

Do subclasses inherit protected methods?

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.

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How do I access protected methods?

To access a protected method, inherit a class from this calls and then create and instance of the chold class and then using the instance object, call the protected method.

Can child classes override properties of their parents?

A child class can override any public parent’s method that is not defined with the final modifier. Also, classes with final modifier cannot be extended.

Can we increase the visibility of the overridden method?

Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience.

Can we override static and private method?

You cannot override a private or static method in Java. If you create a similar method with same return type and same method arguments in child class then it will hide the super class method; this is known as method hiding. Similarly, you cannot override a private method in sub class because it’s not accessible there.

Can abstract method be private?

If a method of a class is private, you cannot access it outside the current class, not even from the child classes of it. But, incase of an abstract method, you cannot use it from the same class, you need to override it from subclass and use. Therefore, the abstract method cannot be private.

Can we overload constructor in Java?

Yes! Java supports constructor overloading. In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters.

Can we overload the main () method?

Yes, we can overload the main method in Java, but When we execute the class JVM starts execution with public static void main(String[] args) method.

Is polymorphism the same as overloading?

Polymorphism means more than one form, same object performing different operations according to the requirement. Method overloading means writing two or more methods in the same class by using the same method name, but the passing parameters are different.

Can we inherit final method in Java?

Ans) Yes, final method is inherited but you cannot override it.

Who can access protected methods in Java?

2. The protected Keyword. While elements declared as private can be accessed only by the class in which they’re declared, the protected keyword allows access from sub-classes and members of the same package.

How can a protected modifier be accessed?

How can a protected modifier be accessed? Explanation: The protected access modifier is accessible within package and outside the package but only through inheritance. The protected access modifier can be used with data member, method and constructor. It cannot be applied in the class.

How can we call a protected method from abstract class?

2 Answers

  1. Create a new class that extends that abstract class SingleBrowserLocator (you will have to implement the abstract methods in it);
  2. Search for a non abstract subclass of SingleBrowserLocator that makes that method public or has other public methods that calls the protected one;

Can abstract class have methods?

Abstract classes are similar to interfaces. You cannot instantiate them, and they may contain a mix of methods declared with or without an implementation. However, with abstract classes, you can declare fields that are not static and final, and define public, protected, and private concrete methods.

Can abstract class have method body?

Abstract methods cannot have body. Abstract class can have static fields and static method, like other classes. An abstract class cannot be declared as final.

Can parent class inherit from child class?

Inheritance allows us to define a class that inherits all the methods and properties from another class. Parent class is the class being inherited from, also called base class. Child class is the class that inherits from another class, also called derived class.

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Can a parent inherit from a child class?

I think No. Inheritance concept is to inherit properties from one class to another but not vice versa. But since parent class reference variable points to sub class objects. So it is possible to access child class properties by parent class object if only the down casting is allowed or possible….

Which modifier Cannot override?

Rule #8:Constructors cannot be overridden.

Because constructors are not methods and a subclass’ constructor cannot have same name as a superclass’ one, so there’s nothing relates between constructors and overriding.

Can overridden method have different return type?

The overriding method has the same name, number and type of parameters, and return type as the method that it overrides. An overriding method can also return a subtype of the type returned by the overridden method. This subtype is called a covariant return type.

Can we have abstract class without abstract method?

Yes, we can declare an abstract class with no abstract methods in Java. An abstract class means that hiding the implementation and showing the function definition to the user.

Can static private final make abstract class?

Declaring abstract method static

If you declare a method in a class abstract to use it, you must override this method in the subclass. But, overriding is not possible with static methods. Therefore, an abstract method cannot be static.

Can we make constructor 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 extend final class in Java?

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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.

Can we declare local inner class as abstract?

Local Inner classes are not a member of any enclosing classes. They belong to the block they are defined within, due to which local inner classes cannot have any access modifiers associated with them. However, they can be marked as final or abstract.

Can we declare interface as private?

Therefore, the members of an interface cannot be private. If you try to declare the members of an interface private, a compile-time error is generated saying “modifier private not allowed here”.

Can singleton class have multiple constructors?

EDIT: IF you have a singleton-class you won´t need both constructor. All your initializations can be done by the default one, where you set all important members of that instance whereas the static one can be omitted.

Can we declare constructor as static?

No, we cannot define a static constructor in Java, If we are trying to define a constructor with the static keyword a compile-time error will occur. In general, static means class level. A constructor will be used to assign initial values for the instance variables.

Can constructor synchronized Java?

Note that constructors cannot be synchronized — using the synchronized keyword with a constructor is a syntax error. Synchronizing constructors doesn’t make sense, because only the thread that creates an object should have access to it while it is being constructed.

Can constructor have void return type?

Note that the constructor name must match the class name, and it cannot have a return type (like void ). Also note that the constructor is called when the object is created.

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Can we override static method?

No, we cannot override static methods because method overriding is based on dynamic binding at runtime and the static methods are bonded using static binding at compile time. So, we cannot override static methods. The calling of method depends upon the type of object that calls the static method.

Can we have 2 main methods in Java?

From the above program, we can say that Java can have multiple main methods but with the concept of overloading. There should be only one main method with parameter as string[ ] arg.

Can we extend a static class?

Just like static members, a static nested class does not have access to the instance variables and methods of the outer class. You can extend static inner class with another inner class.

Can we inherit abstract class in Java?

The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class).

What is inheritance in OOP?

Inheritance in OOP = When a class derives from another class. The child class will inherit all the public and protected properties and methods from the parent class. In addition, it can have its own properties and methods. An inherited class is defined by using the extends keyword.

Does overloading happen at compile-time?

Overloading happens at compile-time while Overriding happens at runtime: The binding of overloaded method call to its definition has happens at compile-time however binding of overridden method call to its definition happens at runtime.

Can a static class be inherited?

Static classes are sealed and therefore cannot be inherited. They cannot inherit from any class except Object. Static classes cannot contain an instance constructor. However, they can contain a static constructor.

Can Object class be a base class?

The Object class is the base class for all the classes in the . Net Framework.

How do you call a protected method in SAP?

Protected methods are essentially for inherited calsses only. To access a protected method, inherit a class from this calls and then create and instance of the chold class and then using the instance object, call the protected method.

How can we access protected class method?

The method displayed in class A is protected and class B is inherited from class A and this protected method is then accessed by creating an object of class B.

  1. Within the same class.
  2. Subclasses of the same packages.
  3. Different classes of the same packages.
  4. Subclasses of different packages.

Can protected methods be accessed by classes in different package?

protected allows access from subclasses and from other classes in the same package. That’s why any Derived class instance can access the protected method in Base .

Can protected members be accessed by objects?

Protected members in a class are similar to private members as they cannot be accessed from outside the class. But they can be accessed by derived classes or child classes while private members cannot.

Why constructors are not inherited?

In simple words, a constructor cannot be inherited, since in subclasses it has a different name (the name of the subclass). Methods, instead, are inherited with “the same name” and can be used.

What is the difference between private and protected?

Things that are private are only visible within the class itself. Things that are protected are visible in the class itself and in subclasses.

Can inner class be protected?

You can just think protected inner class is protected member, so it only access for class, package, subclass but not for the world. In addition, for outter class, there is only two access modifier for it. Just public and package.