如何从Java中查找IPersistentMap中的Clojure关键字？

Question

Calling a Clojure library from a Java program. I get an IPersistentMap back.

The keys are Clojure keywords like :name etc.

But it seems I can't just do a

map.valAt(":name");

to pull it out in Java. I'm guessing that's because the keys aren't normal java Strings. So what are they? And how can I pull data out of an IPersistentMap?

Answer 1

You don't need to use the reader. Clojure keywords are of type clojure.lang.Keyword . You can create one using the static method intern :

map.valAt(clojure.lang.Keyword.intern("name")); // Note: no leading colon

Answer 2

Have you tried using Clojure.read ? =>

map.valAt(Clojure.read(":name"))

or maybe => // (:name my-map) myMap.invoke(Clojure.read(":name"));

Clojure 1.6 Java API https://github.com/clojure/clojure/blob/master/changes.md#21-java-api

Clojure's JavaDoc https://clojure.github.io/clojure/javadoc/