/* * A 1.4 application that demonstrates using spinners. * Other files required: *   SpringUtilities.java *   CyclingSpinnerListModel.java */import javax.swing.*;import java.awt.Color;import java.awt.Container;import java.util.Calendar;import java.util.Date;public class SpinnerDemo extends JPanel {    public SpinnerDemo(boolean cycleMonths) {        super(new SpringLayout());        String[] labels = {"Month: ", "Year: ", "Another Date: "};        int numPairs = labels.length;        Calendar calendar = Calendar.getInstance();        JFormattedTextField ftf = null;        //Add the first label-spinner pair.        String[] monthStrings = getMonthStrings(); //get month names        SpinnerListModel monthModel = null;        if (cycleMonths) { //use custom model            monthModel = new CyclingSpinnerListModel(monthStrings);        } else { //use standard model            monthModel = new SpinnerListModel(monthStrings);        }        JSpinner spinner = addLabeledSpinner(this,                                             labels[0],                                             monthModel);        //Tweak the spinner's formatted text field.        ftf = getTextField(spinner);        if (ftf != null ) {            ftf.setColumns(8); //specify more width than we need            ftf.setHorizontalAlignment(JTextField.RIGHT);        }        //Add second label-spinner pair.        int currentYear = calendar.get(Calendar.YEAR);        SpinnerModel yearModel = new SpinnerNumberModel(currentYear, //initial value                                       currentYear - 100, //min                                       currentYear + 100, //max                                       1);                //step        //If we're cycling, hook this model up to the month model.        if (monthModel instanceof CyclingSpinnerListModel) {            ((CyclingSpinnerListModel)monthModel).setLinkedModel(yearModel);        }        spinner = addLabeledSpinner(this, labels[1], yearModel);        //Make the year be formatted without a thousands separator.        spinner.setEditor(new JSpinner.NumberEditor(spinner, "#"));        //Add the third label-spinner pair.        Date initDate = calendar.getTime();        calendar.add(Calendar.YEAR, -100);        Date earliestDate = calendar.getTime();        calendar.add(Calendar.YEAR, 200);        Date latestDate = calendar.getTime();        SpinnerModel dateModel = new SpinnerDateModel(initDate,                                     earliestDate,                                     latestDate,                                     Calendar.YEAR);//ignored for user input        spinner = addLabeledSpinner(this, labels[2], dateModel);        spinner.setEditor(new JSpinner.DateEditor(spinner, "MM/yyyy"));        //Tweak the spinner's formatted text field.        ftf = getTextField(spinner);        if (ftf != null ) {            ftf.setHorizontalAlignment(JTextField.RIGHT);            ftf.setBorder(BorderFactory.createEmptyBorder(1,1,1,3));        }        spinner.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));        //XXX: No easy way to get to the buttons and change their border.        //Lay out the panel.        SpringUtilities.makeCompactGrid(this,                                        numPairs, 2, //rows, cols                                        10, 10,        //initX, initY                                        6, 10);       //xPad, yPad    }    /**     * Return the formatted text field used by the editor, or     * null if the editor doesn't descend from JSpinner.DefaultEditor.     */    public JFormattedTextField getTextField(JSpinner spinner) {        JComponent editor = spinner.getEditor();        if (editor instanceof JSpinner.DefaultEditor) {            return ((JSpinner.DefaultEditor)editor).getTextField();        } else {            System.err.println("Unexpected editor type: "                               + spinner.getEditor().getClass()                               + " isn't a descendant of DefaultEditor");            return null;        }    }    /**     * DateFormatSymbols returns an extra, empty value at the     * end of the array of months.  Remove it.     */    static protected String[] getMonthStrings() {        String[] months = new java.text.DateFormatSymbols().getMonths();        int lastIndex = months.length - 1;        if (months[lastIndex] == null           || months[lastIndex].length() <= 0) { //last item empty            String[] monthStrings = new String[lastIndex];            System.arraycopy(months, 0,                             monthStrings, 0, lastIndex);            return monthStrings;        } else { //last item not empty            return months;        }    }    static protected JSpinner addLabeledSpinner(Container c,                                                String label,                                                SpinnerModel model) {        JLabel l = new JLabel(label);        c.add(l);        JSpinner spinner = new JSpinner(model);        l.setLabelFor(spinner);        c.add(spinner);        return 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("SpinnerDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new SpinnerDemo(false);        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();            }        });    }}