Code Samples#

This page describes code samples that might be useful, either when learning Kotlin or figuring out a technique for your application.

If you use any code samples from here or elsewhere, make sure that you abide by our code policies and acknowledge your sources!

Course Repositories#

We maintain public repositories in GitLab. The following projects are available:

• demos/*: full applications (console and desktop), with issue lists, documentation etc.
• kotlin-language: Kotlin language examples. Used in lectures.
• sample code: smaller, limited applications used to demonstrate specific functionality e.g., database connections, UI dialogs. Grouped into desktop/android folders based on platform.
• templates: project documents e.g., meeting minute templates.

To get a copy, git clone the URL for the repository that you want to open. This command, for instance, would create a copy of the kotlin-language project in a directory of the same name.

$ git clone https://git.uwaterloo.ca/cs346/kotlin-language.git

The sample code folder contains code to accompany the lecture slides.

External Repositories#

This is a mix of tutorial links and code repositories.

Kotlin Code#

• Atomic Kotlin Exercises: Exercises to accompany the Atomic Kotlin book.
• Kotlin Programming Language. GitHub repo for the Kotlin project.
• Kotlin-Algorithms-and-Design-Patterns. Algorithms and design patterns.

Kotlin Multiplatform Code#

• kmm-basic-sample. Cross-platform mobile application.
• my-bird-app. Cross-platform mobile with Compose.
• John O’Reilly’s KMP samples. Many samples, some of which are included in the official Kotlin KMP repo.
• Ktor codeSnippets. Networking with Ktor.
• Exposed Samples. Databases with Exposed.

Compose Code#

• Compose Multiplatform Repo. Desktop applications for macOS, Windows, Linux.
• Compose Charts Desktop. Simple plots.
• Compose Color Picker. Graphical colour chooser.
• Jetpack Compose for Android Developers. Google code path.
• Jetpack Compose Repo. Mobile applications for Android.
• State in Jetpack Compose. Advanced code lab.

Cloud Computing#

• Google Cloud Platform Kotlin Samples. Official samples.
• How to Publish a Ktor Docker Image to Container Registry Using the Ktor Plugin. Publish from your IDE.
• Serverless Kotlin on Google Cloud Run. Getting a Ktor service running in the cloud.

Final Word#