Getting Clojure

Packages

So far we’ve been using the fully qualified classnames for files: java.io.File and java.awt.Rectangle. Since that can be a bit of a mouthful, Clojure provides import. In much the same way that you can use require/:as to create syntactical shortcuts for the denizens of your Clojure namespaces, you can use import to do the same with Java classes. In the REPL you can use the stand-alone form of import:

;; In the REPL.

(import java.io.File)

If you are writing a .clj file you should include the import in the ns at the top:

(ns read-authors
  (:import java.io.File))

Note that there is no quoting needed in either form. However you do it, once you have imported a class you can refer to the class without its package name:

(def authors ...