LoginSignup
3
1

More than 5 years have passed since last update.

javax.swingのHello WorldをClojureで書く

Last updated at Posted at 2016-10-26

ふと思いついたのでオラクル社が提供しているチュートリアルをやってみた。

Java版

package start;

/*
 * HelloWorldSwing.java requires no other files. 
 */
import javax.swing.*;        

public class HelloWorldSwing {
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("HelloWorldSwing");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Add the ubiquitous "Hello World" label.
        JLabel label = new JLabel("Hello World");
        frame.getContentPane().add(label);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

Clojure版

(ns start.core
  (:import [javax.swing JFrame JLabel SwingUtilities]))

(defn start []
  (let [frame (JFrame. "HelloWorldSwing")
        label (JLabel. "Hello World")]
    (-> frame .getContentPane (.add label))
    (doto frame (.setDefaultCloseOperation JFrame/DISPOSE_ON_CLOSE) .pack (.setVisible true))))
  • Clojure版の方はreplからstart関数を呼ぶだけで結果が確認できるのでmain関数を書かなかった。
  • Clojure版の方は(.setDefaultCloseOperation JFrame/EXIT_ON_CLOSE)するとreplを道連れにしてしまうのでDISPOSE_ON_CLOSEとした。
3
1
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
3
1