Скачать или смотреть What Are The Various Access Specifiers in Java? | Java Interview Questions

What Are The Various Access Specifiers in Java? | Java Interview Questions

In Java, there are four main access specifiers: public, which allows access from any other class; protected, which permits access to classes in the same package or subclasses; default (no specifier),
which restricts access to classes within the same package; and private, which confines access to the declaring class only. Each specifier sets visibility and accessibility levels for classes, methods, and variables.

Java, as a robust object-oriented programming language, provides various access specifiers to regulate the accessibility of classes, methods, and other members. These specifiers determine the scope of access level for different parts of your Java code, thereby helping in encapsulating the information.

Here are the four main access specifiers in Java:

Public: The public access specifier allows the class, method, or field to be accessible from any other class or method in any package. Using the public specifier maximizes accessibility, making it crucial for components that need to be available across different modules of an application.

Private: The private access specifier restricts the visibility to the defining class only. It is used to encapsulate the data that should be hidden from other parts of the program. Private members cannot be accessed directly from outside their own class, not even from derived classes.

Protected: The protected access specifier restricts the access to the same package or subclasses located in any package. This is particularly useful when you want to hide the member from the world but still make it available to its subclasses, including those in different packages.

Default (Package-Private): When no access specifier is explicitly defined, Java uses default access, which allows the members to be accessible only within the same package. This is less restrictive than private but more restrictive than protected and public.

Understanding how to use these access specifiers effectively can lead to better structure and security in your Java applications, making your code more modular and maintainable.

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