Here you can find the source of formatSpinner(JSpinner spinner, String format)
public static void formatSpinner(JSpinner spinner, String format)
//package com.java2s; /* Copyright (C) 2000-2003 The Software Conservancy as Trustee. * All rights reserved./*from ww w . j av a 2s.c o m*/ * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Nothing in this notice shall be deemed to grant any rights to trademarks, * copyrights, patents, trade secrets or any other intellectual property of the * licensor or any contributor except as expressly stated herein. No patent * license is granted separate from the Software, for code that you delete from * the Software, or for combinations of the Software with other software or * hardware. */ import javax.swing.*; import java.awt.*; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.*; public class Main { public static void formatSpinner(JSpinner spinner, String format) { JComponent editor = spinner.getEditor(); Dimension preferredSize = null; if (editor instanceof JSpinner.NumberEditor) { JSpinner.NumberEditor numberEditor = (JSpinner.NumberEditor) editor; numberEditor.getFormat().applyPattern(format); preferredSize = calculateDimensionForFormat(format); } else if (editor instanceof JSpinner.DateEditor) { JSpinner.DateEditor dateEditor = (JSpinner.DateEditor) editor; dateEditor.getFormat().applyPattern(format); preferredSize = calculateDimensionForDateFormat(format); } if (preferredSize != null) { preferredSize.height = preferredSize.height - spinner.getInsets().top - spinner.getInsets().bottom; preferredSize.width = preferredSize.width - spinner.getInsets().left - spinner.getInsets().right; editor.setPreferredSize(preferredSize); } } public static Dimension calculateDimensionForFormat(String formatString) { return new JTextField(formatString).getPreferredSize(); } public static Dimension calculateDimensionForDateFormat(String dateFormatString) { // the standard dateSpinner size is based on its contents, therefore if you initalise one with a null date // it appears as a smaller spinner. Override the preferredSize so it is based on the date format DateFormat dateFormat = new SimpleDateFormat(dateFormatString); Calendar dummyCalendar = Calendar.getInstance(); dummyCalendar.set(2222, 02, 22, 22, 22, 22); // try and achieve the maximum size, therefore no '1' digits JTextField dateFormatField = new JTextField(dateFormat.format(dummyCalendar.getTime())); Dimension preferredSize = dateFormatField.getPreferredSize(); // Increase the width to accommodate the some of space the JSpinner button uses on certain LookAndFeel Themes. preferredSize.width = preferredSize.width + 4; return preferredSize; } }