(ns training.core
  (:import (java.util Date)))

(Date.)
(Date. 2018 02 17)

(new Date)
(new Date 2018 02 17)

(.length "hello world")
(.isDirectory (java.io.File. "my-dir"))

(. "hello world" length)
(. (java.io.File. "my-dir") isDirectory)

(Math/pow 1 2)
(.print System/out "hi")

java.nio.channels.FileChannel$MapMode/READ_ONLY

(ns training.core
  (:import (java.util HashMap)))
(doto (HashMap.)
  (.put "a" 1)
  (.put "b" 2))
=> {"a" 1, "b" 2}

(.listFiles (java.io.File. ".")
  (reify
    java.io.FileFilter
    (accept [this f]
      (.isDirectory f))))

:java-source-paths ["java-src"]

lein compile