Kotlin Desktop App from Scratch: Compose + Material3 | Lesson 01

Learn how to build your first Kotlin desktop application using Compose Multiplatform! In this lesson we set up a project from scratch with Gradle, configure the Compose Desktop plugin, and write a Hello World app with a click counter using Material3. What You'll Learn: - Installing Java, Kotlin, and Gradle prerequisites - Creating a Compose Multiplatform project manually (no IDE wizard) - Configuring settings.gradle.kts and build.gradle.kts - Understanding the Compose Desktop project structure - Writing your first @Composable function - Using remember + mutableStateOf for state management - Applying Material3 dark theme - Running your app with ./gradlew run Timestamps: 0:00 - Introduction 0:15 - Prerequisites Check 0:45 - Creating the Project 2:15 - Project Structure Overview 3:15 - Writing Your First App (Main.kt) 4:45 - Live Demo: Hello Compose 5:45 - Recap & Key Takeaways 6:45 - End Screen Source Code: https://github.com/GoCelesteAI/kotlin-desktop-tutorial Key Takeaways: 1. Kotlin + Compose Multiplatform builds native desktop apps on JVM 2. Gradle plugins handle all build configuration 3. @Composable functions declare reactive UI 4. remember + mutableStateOf tracks state across recompositions 5. Material3 provides dark theme and components out of the box Related Lessons: Lesson 02: Layouts & Styling in Compose Desktop (coming soon) Tech Stack: Kotlin 2.1, Compose Multiplatform 1.7.3, Material3 Gradle 8.10, JVM 17+ If you found this helpful, please like and subscribe for more Kotlin Desktop tutorials! #kotlin #compose #desktop #material3 #gradle #tutorial #pr