ICSE 11 Computer Applications | 14. Packages by Pavan | Learn Smarter
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14. Packages

14. Packages

Packages in Java serve as namespaces that organize related classes and interfaces, enhancing code maintainability while preventing naming conflicts. The chapter discusses built-in and user-defined packages, syntactical rules for creating and using packages, access control mechanisms, and recommended naming conventions. Understanding how to leverage packages is essential for effective code management in large projects.

17 sections

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Sections

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  1. 14

    This section explores the concept of packages in Java, their importance,...

  2. 14.1
    Introduction To Packages

    This section introduces Java packages as a means to organize related classes...

  3. 14.2
    Types Of Packages

    This section discusses the different types of packages in Java, including...

  4. 14.2.1
    Built-In Packages

    This section introduces Java's built-in packages, which provide a set of...

  5. 14.2.2
    User-Defined Packages

    User-defined packages in Java allow programmers to create organized...

  6. 14.3
    Creating A User-Defined Package

    This section explains how to create user-defined packages in Java to...

  7. 14.4
    Accessing Classes From A Package

    This section explains how to access classes from Java packages using the...

  8. 14.5
    Package Naming Conventions

    This section discusses the conventions for naming packages in Java to avoid...

  9. 14.6
    Access Control In Packages

    This section discusses access control in Java packages through access...

  10. 14.6.1

    This section explains the public access level in Java packages, which allows...

  11. 14.6.2
    Private
  12. 14.6.3
    Protected
  13. 14.6.4
    Default (Package-Private)

    The Default (Package-Private) access modifier in Java restricts visibility...

  14. 14.7
    Sub-Packages

    Sub-packages in Java allow for organizing classes within a structured...

  15. 14.8
    Java’s Built-In Packages

    Java's built-in packages provide a collection of pre-defined classes and...

  16. 14.9
    Using Java’s Built-In Packages

    This section explores how to utilize Java's built-in packages to enhance...

  17. 14.10

    The conclusion summarizes the importance of packages in Java for code...

What we have learnt

  • A package organizes Java classes into namespaces.
  • Built-in packages provide pre-defined functionality, while user-defined packages help organize custom classes.
  • Access control in Java includes public, private, protected, and default levels, allowing precise visibility management for classes and members.
  • Sub-packages allow further classification within package hierarchies.

Key Concepts

-- Package
A namespace that organizes related classes and interfaces in Java.
-- Builtin Packages
Pre-defined packages provided by Java, such as java.util, java.io, and java.math.
-- Userdefined Packages
Packages created by programmers to organize their own classes and enhance code structure.
-- Access Control
Mechanisms in Java that manage the visibility and accessibility of classes and members through access modifiers.
-- Subpackages
Packages nested within other packages to further organize classes hierarchically.

Additional Learning Materials

Supplementary resources to enhance your learning experience.