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. Different classes of same packages.
What is protected in Java with example?
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. The following table shows the access to members permitted by each modifier.
What is the difference between protected and private in Java?
protected : accessible by the classes of the same package and the subclasses residing in any package. default (no modifier specified): accessible by the classes of the same package. private : accessible within the same class only.
What is protected in a class?
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: Member functions of the class that originally declared these members.
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.
What is the difference between protected and private?
Things that are protected are visible in the class itself and in subclasses. The difference is who can access those functions. Private = only members of the same class can access the function. Protected = Same as private but derived classes can also access.
What are protected methods?
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 .
Can we override static method?
Static methods cannot be overridden because they are not dispatched on the object instance at runtime. The compiler decides which method gets called. Static methods can be overloaded (meaning that you can have the same method name for several methods as long as they have different parameter types).
Can a class be private or protected in Java?
No, we cannot declare a top-level class as private or protected. It can be either public or default (no modifier).
Why is string immutable in Java?
The String is immutable in Java because of the security, synchronization and concurrency, caching, and class loading. The reason of making string final is to destroy the immutability and to not allow others to extend it. The String objects are cached in the String pool, and it makes the String immutable.
What are the 7 protected classes?
At the federal level, there are seven classes: race, color, religion, sex, national origin, familial status, and handicap (referred to as disability in California).
Why do we have protected classes?
Because there are lots of different laws, everyone is a member of at least one of the groups protected. For example, both men and women are members of a protected class because both men and women can take legal action if they are unlawfully discriminated against on the basis of their gender.
Can we access protected and private members of a class?
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.