Clojure for Java Developers

Clojure, taught the way Java engineers actually learn: concrete examples, JVM-first tooling, and production-minded patterns.

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What this site is

An independent, book-style learning path for moving from Java to idiomatic Clojure on the JVM. The content is organized into focused tracks with short, skimmable chapters you can actually run and apply at work.

What it prioritizes

  • REPL-driven development and fast feedback loops
  • Interop patterns that keep Java/Clojure boundaries clean
  • Testing, data design, and reliability habits
  • Concurrency and async patterns that scale on the JVM

Browse the tracks

Pick a starting point based on your background. Each track is written to be useful on its own.

Start here

Clojure Foundations for Java Developers

Syntax, data structures, namespaces, tooling, and the core mindset shift from OOP to data + functions.

Level up

Intermediate Clojure for Java Engineers

Transducers, reducers, macros, project structure, error handling, and writing maintainable modules.

Mindset shift

Migrating from Java OOP to Functional Clojure

A practical bridge: modeling state, designing boundaries, and “thinking in data” without losing engineering rigor.

Patterns

Clojure Design Patterns & Best Practices

Clojure idioms that replace common Java patterns: composition, data-driven design, and pragmatic architecture.

Functional mastery

Mastering Functional Programming with Clojure

Higher-order functions, laziness, transducers, and practical FP patterns for clear and fast JVM code.

Enterprise

Clojure Frameworks & Libraries

Building services on the JVM with real tooling: HTTP, async, logging, testing, and deployment basics.

Data

Clojure & NoSQL

Modeling, schema evolution, pipelines, persistence patterns, and working with messy real-world data.

Feedback and corrections

If you spot an error, have a clearer example, or want to suggest a topic, email us. We continuously improve the material.

Contact: info@clojureforjava.com