Java 8 Recipes

Source code for Modern Java Recipes (O'Reilly, 2017)

http://shop.oreilly.com/product/0636920056669.do

Project Status

This project has been modernized and updated with the latest tooling:

• Java 17 (using Gradle toolchain support)
• Gradle 8.14.2 (latest stable)
• JUnit 5.13.2 (migrated from JUnit 4, using BOM management)
• Modern build configuration with dependency management

Requirements

• Java 17 or later (automatically managed by Gradle toolchain)
• No additional setup required - Gradle wrapper handles everything

Quick Start

# Clone the repository
git clone <repository-url>
cd java_8_recipes

# Run tests
./gradlew test

# Build the project
./gradlew build

IDE Setup

IntelliJ IDEA

1. Clone repo or download zip and extract
2. Use File -> Open or if no project is open, Import
3. Navigate to the build.gradle file inside the project
4. Click enter and accept all the defaults
5. IntelliJ will automatically configure the project with Java 17

Eclipse (and Eclipse-based tools, like STS)

1. Open a command prompt in the root of the project
2. Type ./gradlew cleanEclipse eclipse (Unix/Mac) or gradlew cleanEclipse eclipse (Windows)
3. Wait for the dependencies to be downloaded
4. Choose File -> Import… -> General -> Existing Projects into Workspace
5. Navigate to the root of the project and select it

Testing

All tests have been migrated to JUnit 5 and use modern testing patterns:

# Run all tests
./gradlew test

# Run tests with detailed output
./gradlew test --info

# Run specific test class
./gradlew test --tests "concurrency.CompletableFutureTests"

Project Structure

The project contains examples and tests for Java 8+ features including:

• Concurrency: CompletableFuture, parallel streams
• Streams: Operations, collectors, patterns
• Optional: Usage patterns and best practices
• Date/Time: Modern java.time API
• Lambdas: Functional programming patterns
• Collectors: Custom and built-in collectors

Recent Updates

• Upgraded from Gradle 7.5.1 to 8.14.2
• Migrated from Java 11 to Java 17 (using toolchain)
• Complete migration from JUnit 4 to JUnit 5
• Modernized dependency management with version catalogs
• Removed deprecated JUnit vintage engine dependency