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.
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 protected access in Java?
The access modifiers in Java specifies the accessibility or scope of a field, method, constructor, or class. … Protected: The access level of a protected modifier is within the package and outside the package through child class. If you do not make the child class, it cannot be accessed from outside the package.
When should I use protected in Java?
Use it when you need to do some internal stuff that is not exposed in public API but still needs to be overriden by subclasses. You need to use the protected access modifier, when you want the descendant class to see the fields / methods of the super class, BUT you do not want other classes to see these.
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 we use protected for a class in Java?
No, we cannot declare a top-level class as private or protected. It can be either public or default (no modifier).
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.
Who can access protected Java?
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.
Can we override protected method in Java?
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.
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.
How are protected variables used in Java?
Basically, the protected keyword is an access modifier for method and variable of a class.
When a method or a variable is marked as protected, it can be accessed from:
- Within the enclosing class.
- Other classes in the same package as the enclosing class.
- Sub classes, regardless of packages.
Why private is used in Java?
Private: The private access modifier is specified using the keyword private. The methods or data members declared as private are accessible only within the class in which they are declared. Any other class of the same package will not be able to access these members.
What is protected vs private?
private: The type or member can be accessed only by code in the same class or struct . protected: The type or member can be accessed only by code in the same class , or in a class that is derived from that class .
Why there is no destructor in Java?
In Java, the garbage collector automatically deletes the unused objects to free up the memory. Developers have no need to mark the objects for deletion, which is error-prone and vulnerable to the memory leak. So it’s sensible Java has no destructors available.
What is public/private protected in Java?
Public members can be accessed from the child class of the same package. Private members cannot be accessed from the child class of the same package. Protected members can be accessed from the child class of the same package. Package members can be accessed from the child class of the same package.
What does private mean in Java?
The private keyword is an access modifier used for attributes, methods and constructors, making them only accessible within the declared class.