How to import Java class in ClojureScript?

Question

I am using a ClojureScript browser REPL in SublimeText, and there are certain Java methods included:

(.toUpperCase "blub") --> "BLUB"

However, I'd like to use .toBinaryString, but java.lang.Integer is not included and I'm not sure how to import it. (import %) doesn't work no matter what format I use for %; it always throws:

cannot read property "call" of undefined

My question is two parts; how can I see what Java libs are included in the REPL, and how do I use other libraries that aren't included?

Rodrigo Taboada · Accepted Answer · 2015-02-10 12:09:09Z

3

ClojureScript compiles to JavaScript, the toUpperCase method that you called comes from JavaScript String not Java's. The only time in ClojureScript that you could use Java is when you're writing a macro. But that is because macros are written in Clojure, not in ClojureScript.

This is a list of the differences between Clojure and ClojureScript.

answered Feb 10, 2015 at 12:09

Rodrigo Taboada

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2 Comments

Phylth Over a year ago

I've read that and several articles on cljs-js interop, but whenever I try to use a js library (prototype.js in this case for the toString function), I get an error. This is after including a :libs and :foreign-libs clause in my project.clj file and requiring it in the namespace. I don't understand it.

Rodrigo Taboada Over a year ago

Please create another question about that problem, or search in stackoverflow. Your original question was about Java interop, no?

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