/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package components;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.*;import java.util.*;import java.text.SimpleDateFormat;/* ComboBoxDemo2.java requires no other files. */public class ComboBoxDemo2 extends JPanel                           implements ActionListener {    static JFrame frame;    JLabel result;    String currentPattern;    public ComboBoxDemo2() {        setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));        String[] patternExamples = {                 "dd MMMMM yyyy",                 "dd.MM.yy",                 "MM/dd/yy",                 "yyyy.MM.dd G 'at' hh:mm:ss z",                 "EEE, MMM d, ''yy",                 "h:mm a",                 "H:mm:ss:SSS",                 "K:mm a,z",                 "yyyy.MMMMM.dd GGG hh:mm aaa"                 };        currentPattern = patternExamples[0];        //Set up the UI for selecting a pattern.        JLabel patternLabel1 = new JLabel("Enter the pattern string or");        JLabel patternLabel2 = new JLabel("select one from the list:");        JComboBox patternList = new JComboBox(patternExamples);        patternList.setEditable(true);        patternList.addActionListener(this);        //Create the UI for displaying result.        JLabel resultLabel = new JLabel("Current Date/Time",                                        JLabel.LEADING); //== LEFT        result = new JLabel(" ");        result.setForeground(Color.black);        result.setBorder(BorderFactory.createCompoundBorder(             BorderFactory.createLineBorder(Color.black),             BorderFactory.createEmptyBorder(5,5,5,5)        ));        //Lay out everything.        JPanel patternPanel = new JPanel();        patternPanel.setLayout(new BoxLayout(patternPanel,                               BoxLayout.PAGE_AXIS));        patternPanel.add(patternLabel1);        patternPanel.add(patternLabel2);        patternList.setAlignmentX(Component.LEFT_ALIGNMENT);        patternPanel.add(patternList);        JPanel resultPanel = new JPanel(new GridLayout(0, 1));        resultPanel.add(resultLabel);        resultPanel.add(result);        patternPanel.setAlignmentX(Component.LEFT_ALIGNMENT);        resultPanel.setAlignmentX(Component.LEFT_ALIGNMENT);        add(patternPanel);        add(Box.createRigidArea(new Dimension(0, 10)));        add(resultPanel);        setBorder(BorderFactory.createEmptyBorder(10,10,10,10));        reformat();    } //constructor    public void actionPerformed(ActionEvent e) {        JComboBox cb = (JComboBox)e.getSource();        String newSelection = (String)cb.getSelectedItem();        currentPattern = newSelection;        reformat();    }    /** Formats and displays today's date. */    public void reformat() {        Date today = new Date();        SimpleDateFormat formatter =           new SimpleDateFormat(currentPattern);        try {            String dateString = formatter.format(today);            result.setForeground(Color.black);            result.setText(dateString);        } catch (IllegalArgumentException iae) {            result.setForeground(Color.red);            result.setText("Error: " + iae.getMessage());        }    }    /**     * 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("ComboBoxDemo2");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new ComboBoxDemo2();        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();            }        });    }}