This repository presents a modernized and expanded perspective on Java 8+ features, designed as a functional programming toolkit and an educational platform. It demonstrates contemporary approaches to core Java concepts, Stream API usage, and robust testing practices.
Originally based on the vinsguru/java-8-and-beyond project, this version significantly refactors examples to enhance clarity, functional purity, and adopts JUnit 5 for state-of-the-art testing.
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Functional-first design: Emphasizes immutability, composability, and expressive APIs by leveraging Java 8+ functional programming features like Streams, Lambdas, and Optional.
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Modern Testing: Fully embraces JUnit 5 (JUnit Jupiter) for comprehensive, parameterized, and more maintainable test suites, replacing older testing frameworks.
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Educational focus: Intended to explore and teach advanced Java concepts, functional idioms, and modern testing methodologies.
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Clarity over raw performance: While efficiency is considered, the design primarily favors code readability, functional purity, and illustrating best practices. Performance is not universally optimized for production workloads.
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Minimal dependencies: Focuses on core Java capabilities to keep the learning platform clean and directly demonstrate language features.
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Extensibility: Designed to evolve by incorporating additional modern Java patterns and testing examples over time.
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Comprehensive Stream API usage: Demonstrates powerful map, filter, reduce, flatMap, and other terminal/intermediate operations.
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Lambda expressions and Method References: Practical examples illustrating concise and expressive code.
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Robust input validation and error handling: Showcases effective exception management within functional pipelines.
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Parameterized JUnit 5 tests: Extensive use of @ParameterizedTest for thorough and data-driven testing.
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Flexible File and Classpath Resource Handling: Examples on accessing files relative to the current working directory, classpath resources, and user home directory.
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Demonstrations of various core Java 8+ features and utilities.
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Clone the repository:
git clone <your-repo-url>
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Build with Maven:
mvn clean install
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Explore the examples and tests:
Dive into the src/main/java module to see the modernized code examples.
Check the src/test/java module for comprehensive JUnit 5 tests demonstrating usage and validation.
This project is licensed under the Apache License 2.0 - see the LICENSE file for details.
Contributions are welcome! Please open issues or pull requests to suggest improvements or report bugs.
Ofek Malka
📧 om.ofekmalka@gmail.com
Enjoy exploring functional programming in Java! 🚀