complete tutorials on core java in java

: No it is applied only to class and methods No, the abstract modifier cannot be applied to a variable in Java. The abstract modifier is used with classes and methods, not with variables. In Java, you use the abstract keyword to declare abstract classes and methods. An abstract class is a class that cannot … Read more

No the reference cannot be change, but the data in that object can be changed. In Java, when a reference variable is declared as final, it means that the reference cannot be changed to point to a different object. However, the state of the object itself (i.e., the data within the object) can be modified … Read more

Private method can be overridden by private, friendly, protected or public methods. Friendly method can be overridden by friendly, protected or public methods. Protected method can be overridden by protected or public methods. Public method can be overridden by public method. In Java, method overriding is a feature that allows a subclass to provide a … Read more

You can access protected features from other classes by subclassing the that class in another package, but this cannot be done for friendly features. In Java, the protected access modifier allows access to the members (fields, methods, and nested classes) within the same package or by subclasses, regardless of the package they are in. However, … Read more

No when features are friendly or protected they can be accessed from all the classes in that package but not from classes in another package. In Java, the protected and default (package-private or friendly) access modifiers have different levels of visibility. Protected Access: Members (fields, methods, and nested classes) with the protected access modifier are … Read more