DZone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
Refcards Trend Reports Events Over 2 million developers have joined DZone. Join Today! Thanks for visiting DZone today,
Edit Profile Manage Email Subscriptions Moderation Admin Console How to Post to DZone Article Submission Guidelines
View Profile
Sign Out
Refcards
Trend Reports
Events
Zones
Culture and Methodologies Agile Career Development Methodologies Team Management
Data Engineering AI/ML Big Data Data Databases IoT
Software Design and Architecture Cloud Architecture Containers Integration Microservices Performance Security
Coding Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Partner Zones AWS Cloud
by AWS Developer Relations
Culture and Methodologies
Agile Career Development Methodologies Team Management
Data Engineering
AI/ML Big Data Data Databases IoT
Software Design and Architecture
Cloud Architecture Containers Integration Microservices Performance Security
Coding
Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance
Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Partner Zones
AWS Cloud
by AWS Developer Relations

Trending

  • Never Use Credentials in a CI/CD Pipeline Again
  • 5 Key Concepts for MQTT Broker in Sparkplug Specification
  • Introduction To Git
  • Authorization: Get It Done Right, Get It Done Early

Trending

  • Never Use Credentials in a CI/CD Pipeline Again
  • 5 Key Concepts for MQTT Broker in Sparkplug Specification
  • Introduction To Git
  • Authorization: Get It Done Right, Get It Done Early
  1. DZone
  2. Coding
  3. Java
  4. Calling Clojure from Java

Calling Clojure from Java

Jay Fields user avatar by
Jay Fields
·
May. 28, 09 · Interview
Like (0)
Save
Tweet
Share
10.12K Views

Join the DZone community and get the full member experience.

Join For Free
Calling Clojure from Java is easy, if you know which classes are important. On my current project I make all my Clojure files resources, load them, and call the functions directly. The following example shows Clojure printing the argument it's given.

; printer.clj
(ns printer)

(defn print-string [arg]
(println arg))

// Java calling code
RT.loadResourceScript("printer.clj");
RT.var("printer", "print-string").invoke("hello world");


There's a few things worth noting about the example: RT.var takes the namespace name and the function name. The Var returned by RT.var has an invoke method that allows you to pass any number of Objects. The invoke method also returns an Object, which allows you return values from Clojure where necessary.

It's also worth noting that the Clojure/Java interop is very, very good. You could pass a Java object to Clojure, make changes to it in Clojure, and return it back to Java. Of course, you might not even need to return it to Java since the instance referenced in Clojure would be the same instance referenced in Java.

From http://blog.jayfields.com/

Clojure Java (programming language)

Opinions expressed by DZone contributors are their own.

Trending

  • Never Use Credentials in a CI/CD Pipeline Again
  • 5 Key Concepts for MQTT Broker in Sparkplug Specification
  • Introduction To Git
  • Authorization: Get It Done Right, Get It Done Early

Comments

Partner Resources

X

ABOUT US

  • About DZone
  • Send feedback
  • Careers
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • Become a Contributor
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 600 Park Offices Drive
  • Suite 300
  • Durham, NC 27709
  • support@dzone.com

Let's be friends: