Protected keyword in Java refers to one of its access modifiers. The methods or data members declared as protected can be accessed from: Within the same class. Subclasses of same packages.
What does the keyword protected do?
The protected keyword specifies access to class members in the member-list up to the next access specifier ( public or private ) or the end of the class definition. Class members declared as protected can be used only by the following: … Direct privately derived classes that also have private access to protected members.
What does the protected keyword mean when used in classes?
The protected keyword is an access modifier used for attributes, methods and constructors, making them accessible in the same package and subclasses.
What is protected method?
A protected method is like a private method in that it can only be invoked from within the implementation of a class or its subclasses. It differs from a private method in that it may be explicitly invoked on any instance of the class, and it is not restricted to implicit invocation on self .
What is Protected Access?
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.
What is protected set?
That gives the developer an extra level of control so that derived classes have the ability to set the property’s value but other classes can only get the property’s value. …
What is subclass in Java?
In Java, as in other object-oriented programming languages, classes can be derived from other classes. The derived class (the class that is derived from another class) is called a subclass. The class from which its derived is called the superclass. … Definition: A subclass is a class that derives from another class.
Can we inherit protected class 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.
Can I override protected method in Java?
Yes, the protected method of a superclass can be overridden by a subclass.
What is difference between protected and default in Java?
The protected specifier allows access by all subclasses of the class in question, whatever package they reside in, as well as to other code in the same package. The default specifier allows access by other code in the same package, but not by code that is in subclasses residing in different packages.
What is encapsulation in Java?
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.
What is this keyword in Java?
The this keyword refers to the current object in a method or constructor. The most common use of the this keyword is to eliminate the confusion between class attributes and parameters with the same name (because a class attribute is shadowed by a method or constructor parameter). … Invoke current class constructor.
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 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.