Functional Modern Java

Source code and examples from the "Functional Modern Java" presentation, showcasing modern Java features and functional programming patterns.

Requirements

• Java 21 (LTS) or higher
• Gradle 8.14.2 or higher (wrapper included)

Building and Running

Build the project

./gradlew build

Run tests

./gradlew test

Clean build

./gradlew clean build

Project Structure

src/
├── main/java/          # Main source code with Java examples
├── test/java/          # JUnit 5 test suite

Technology Stack

• Language: Java 21 (using Gradle toolchain)
• Build Tool: Gradle 8.14.2
• Testing: JUnit 5.13.2
• CI: GitHub Actions

Topics Covered

This project demonstrates modern Java features including:

• Lambda expressions and functional interfaces
• Stream API and operations
• Optional handling
• Modern collection utilities
• HTTP client examples
• Local variable type inference (var)
• Interface enhancements
• Generics and type safety

Contributing

All tests use JUnit 5. When adding new tests, follow the existing patterns and ensure compatibility with Java 21.