import javax.swing.JFrame;/* * A 1.4 application that extends SpinnerDemo to allow easy * execution of the demo with a cycling Months spinner. * Other files required: *   SpinnerDemo.java *   CyclingSpinnerListModel.java *   SpringUtilities.java */public class SpinnerDemo2 extends SpinnerDemo {    public SpinnerDemo2() {        super(true); //turn on cycling for the months spinner    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Make sure we have nice window decorations.        JFrame.setDefaultLookAndFeelDecorated(true);        //Create and set up the window.        JFrame frame = new JFrame("SpinnerDemo2");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        SpinnerDemo2 newContentPane = new SpinnerDemo2();        newContentPane.setOpaque(true); //content panes must be opaque        frame.setContentPane(newContentPane);        //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();            }        });    }}