Accessing static fields from inner classes in Clojure

2015-07-05 ·

In Clojure you can access static fields and methods using /.

(Classname/staticMethod args*)
Classname/staticField

e.g.

(System/getProperty "java.vm.version")
Math/PI

If you need to access a static field or method using an inner class, you cannot use ./.. forms and you must use regular Java's $ sign syntax. For the JVM, an inner class Classname.InnerClass is just a class named Classname$InnerClass.

(Classname$InnerClass/staticMethod *args)
Classname$InnerClass/staticField

e.g.

java.nio.channels.FileChannel$MapMode/READ_ONLY

If you are importing Classname with the import function or with the :import keyword, you must also specify that you are importing Classname$InnerClass.

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