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.
Is it possible to override a private method in Java?
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.
Which methods Cannot be override in Java?
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 Java?
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 I access protected method in Java?
The protected access modifier is accessible within the package. However, it can also accessible outside the package but through inheritance only. We can’t assign protected to outer class and interface. If you make any constructor protected, you cannot create the instance of that class from outside the package.
Which method we Cannot be override?
Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call. Static methods are bonded at compile time using static binding. Therefore, we cannot override static methods in Java.
Can we extend protected class in Java?
Yes, the protected method of a superclass can be overridden by a subclass.
Can we prevent overriding a method without using the final modifier?
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. final is best way to say a method is complete and can’t be overridden.
Can we overload and override static method in Java?
The static method is resolved at compile time cannot be overridden by a subclass. An instance method is resolved at runtime can be overridden. A static method can be overloaded.
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.
How do you call a protected method in Java?
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.
- Within the same class.
- Subclasses of the same packages.
- Different classes of the same packages.
- Subclasses of different packages.
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.
Can protected members be accessed by objects Java?
A protected member or constructor of an object may be accessed from outside the package in which it is declared only by code that is responsible for the implementation of that object.
Can constructor be overridden?
Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. But, a constructor cannot be overridden. If you try to write a super class’s constructor in the sub class compiler treats it as a method and expects a return type and generates a compile time error.
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.
Can we have protected constructor in Java?
Modifiers public, protected and, private are allowed with constructors. We can use a private constructor in a Java while creating a singleton class.
Can inner class be protected?
protected Inner Class
There is one more particular case — a protected inner class. As we can see, this is a static inner class, and so can be constructed from outside of an instance of FirstClass. However, as it is protected, we can only instantiate it from code in the same package as FirstClass.
Can return type change in overriding?
From Java 5 onwards, we can override a method by changing its return type only by abiding the condition that return type is a subclass of that of overridden method return type.
Does overloading happens at compile time?
Method overloading is the compile-time polymorphism where more than one methods share the same name with different parameters or signature and different return type. Method overriding is the runtime polymorphism having the same method with same parameters or signature but associated withcompared, different classes.
Can we override final method of abstract class?
No, the Methods that are declared as final cannot be Overridden or hidden. For this very reason, a method must be declared as final only when we’re sure that it is complete. It is noteworthy that abstract methods cannot be declared as final because they aren’t complete and Overriding them is necessary.
Which method Cannot be overridden for an object of object class?
This article explains why it’s important to implement these methods correctly and then explains how to do so. Object declares three versions of the wait method, as well as the methods notify , notifyAll and getClass . These methods all are final and cannot be overridden.
Can we inherit static method in Java?
Static methods do not use any instance variables of any object of the class they are defined in. Static methods take all the data from parameters and compute something from those parameters, with no reference to variables. We can inherit static methods in Java.
Can static classes 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 protected method be called?
protected access modifier allows your subclasses be outside your superclass package and yet still inherit pieces of the class including methods and constructors.. The only way the subclass can access the protected methods is by inheritance…
Can we inherit private members of class in Java?
No, the private member are not inherited because the scope of a private member is only limited to the class in which it is defined. Only the public and protected member are inherited.
Can a non private method in a superclass can be overridden?
No, you are not overriding it. You can check by trying to mark it with @Override , or by trying to make a call to super.
How do I access protected variables?
Protected Access Modifier – Protected
Variables, methods, and constructors, which are declared protected in a superclass can be accessed only by the subclasses in other package or any class within the package of the protected members’ class. The protected access modifier cannot be applied to class and interfaces.
Why we use protected in Java?
The protected keyword is an access modifier used for attributes, methods and constructors, making them accessible in the same package and subclasses.
What is difference between private public and protected?
Broadly speaking, public means everyone is allowed to access, private means that only members of the same class are allowed to access, and protected means that members of subclasses are also allowed. However, each language adds its own things to this.
Can constructors and destructors be inherited?
Constructors and destuctors are not members of the class and not inherited but instead automatically invoked if the sub class has no constructor.
Can non abstract methods be overridden?
The non-abstract methods of the superclass are just inherited as they are. They can also be overridden, if needed. Notice how MySubClass has to implement the abstract method abstractMethod() from its abstract superclass MyAbstractClass .
Can abstract method be 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 abstract class have constructor?
Like any other classes in Java, abstract classes can have constructors even when they are only called from their concrete subclasses.
Can constructor be static or final?
Java constructor can not be static
One of the important property of java constructor is that it can not be static. We know static keyword belongs to a class rather than the object of a class. A constructor is called when an object of a class is created, so no use of the static constructor.
Can we override private static final methods?
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.
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 declare abstract method as 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 have protected element as a namespace member?
Elements defined in a namespace cannot be explicitly declared as private, protected, protected internal or private protected.
How do I override a protected constructor in Java?
Protecting a constructor prevents the users from creating the instance of the class, outside the package. During overriding, when a variable or method is protected, it can be overridden to other subclass using either a public or protected modifier only. Outer class and interface cannot be protected.
Can abstract class have protected constructor?
Constructors on abstract types can be called only by derived types. Because public constructors create instances of a type and you cannot create instances of an abstract type, an abstract type that has a public constructor is incorrectly designed.
Can a class be static in Java?
Classes can be static which most developers are aware of, henceforth some classes can be made static in Java. Java supports Static Instance Variables, Static Methods, Static Block, and Static Classes. The class in which the nested class is defined is known as the Outer Class.
Can inner class be public?
Java inner class can be declared private, public, protected, or with default access whereas an outer class can have only public or default access.
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 override public static void main?
You cannot override static methods and since the public static void main() method is static we cannot override it.
Is it mandatory to have same return type in method overriding?
Yes. It is possible for overridden methods to have different return type . But the limitations are that the overridden method must have a return type that is more specific type of the return type of the actual method.
Is return type should be same in overloading?
No, you cannot overload a method based on different return type but same argument type and number in java.
Can final method be overridden?
You use the final keyword in a method declaration to indicate that the method cannot be overridden by subclasses.
Can we override static and non static method in Java?
A static method cannot override non static method. A non static method cannot override static method.
Which methods 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.