In Java, the public keyword is an access modifier that determines the visibility of classes, methods, and variables. Here are the key points regarding the purpose of public:
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Accessibility: When a class, method, or variable is declared as
public, it can be accessed from any other class in any package. This means there are no restrictions on visibility. -
Encapsulation: Using
publicallows developers to expose certain parts of their code (like methods or variables) to other classes while keeping other parts private or protected. This is a fundamental aspect of encapsulation in object-oriented programming. -
Interoperability: Making classes and methods public allows them to be used by other developers or applications, facilitating code reuse and collaboration.
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Common Usage: The
publicmodifier is commonly used for methods that need to be called from outside the class, such as themain()method, which is public so that the Java Virtual Machine (JVM) can invoke it.
In summary, public is used to define the accessibility of classes, methods, and variables, enabling them to be accessed from anywhere in the program.
