Package in Java.

Package is the Primary way to organize the related classes, Interface and sub packages in to shared name space. That helps to improve organization, maintainability, and re-usability.

Defining a package is the primary way to organize related classes, interfaces, and sub-packages into a shared namespace.

Key purposes

Organization: Structures large projects into smaller, manageable, related units, similar to folders in a file directory.

Prevent Naming Conflicts: Allows different parts of a program to use classes with the same name without conflict.

Access Control: Manages visibility of classes, methods, or variables using modifiers like public, protected, or package-private.

Re-usability & Distribution: Packaged code is easier to import, reuse across projects, or distribute as a library.

Types of Packages

Built-in Packages: Provided by the Java API (Standard Library). (TBD)

    java.lang: Core classes like String and Math; automatically      

imported into every program.

    java.util: Utility classes for collections, dates, and scanners.

    java.io: Support for input and output operations.


User-defined Packages: Created by developers to organize their own code.