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Walkthrough - Kotlin: Packages and Imports

Walkthrough - Kotlin: Packages and Imports

In this lesson, we explored how Kotlin organizes code using packages and how to bring that code into other files using various import strategies.

Changes Made

Implementation

  • Created Utils.kt in a sub-package learn_kotlin.other to provide entities for importing.
  • Created Packages.kt in the main learn_kotlin package which demonstrates:
    • Single Imports: Importing a specific function.
    • Wildcard Imports: Importing all members of a package.
    • Import Aliasing: Using the as keyword to resolve name clashes (e.g., Message vs OtherMessage).
    • Default Imports: Utilizing classes like kotlin.math that are available without explicit headers.
  • Updated App.java to execute the package and import demonstration.

Verification

  • Build: Successfully executed ./gradlew :app:assemble.
  • Logic: Verified that the aliased import correctly refers to the class in the other package while the local Message class remains accessible.

See the Step-by-Step Explanation for technical details.

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