In this quick tutorial, we discussed the protected access modifier in Java. With it, we can ensure exposing only the required data and methods to sub-classes and classes in the same package.
Does Java have protected access?
There are four types of Java access modifiers: Private: The access level of a private modifier is only within the class. It cannot be accessed from outside the class. … Protected: The access level of a protected modifier is within the package and outside the package through child class.
Who can access protected in Java?
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 access control in Java?
Access control is a mechanism, an attribute of encapsulation which restricts the access of certain members of a class to specific parts of a program. Access to members of a class can be controlled using the access modifiers. There are four access modifiers in Java. They are: public.
Is protected default in Java?
What are the differences between protected and default access specifiers in Java? The Protected access specifier is visible within the same package and also visible in the subclass whereas the Default is a package level access specifier and it can be visible in the same package.
What is Java encapsulation?
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.
Why do we use protected 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.
Can a Java class be private or protected?
No, we cannot declare a top-level class as private or protected. It can be either public or default (no modifier).
What is the difference between protected and private in Java?
The private modifier specifies that the member can only be accessed in its own class. The protected modifier specifies that the member can only be accessed within its own package (as with package-private) and, in addition, by a subclass of its class in another package.
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.
What is protected keyword in Java?
Protected keywords are keywords that are used to restrict the scope within which the variable, method, and constructors can be accessed. It is one of the types of access modifiers in Java. They are used to differentiate between the scope of methods, variables, constructors, and classes.
What are the advantages of encapsulation in Java?
Advantages of encapsulation in Java
- The fields of a class can be made read-only or write-only.
- A class can have total control over what is stored in its fields.
Can we access protected member outside the package?
Yes u can. protected member can be access within the package and outside the package but within the child classes. we can use child class to use protected member outside the package but only child class object can access it.
Is there any difference between public protection and private protection?
If the class member declared as public then it can be accessed everywhere. If the class members declared as protected then it can be accessed only within the class itself and by inheriting child classes. If the class members declared as private then it may only be accessed by the class that defines the member.