Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors. * * Project Info: http://www.jfree.org/jfreechart/index.html * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners.] * * -------------- * DateTitle.java * -------------- * (C) Copyright 2000-2014, by David Berry and Contributors. * * Original Author: David Berry; * Contributor(s): David Gilbert (for Object Refinery Limited); * * Changes (from 18-Sep-2001) * -------------------------- * 18-Sep-2001 : Added standard header (DG); * 09-Jan-2002 : Updated Javadoc comments (DG); * 07-Feb-2002 : Changed blank space around title from Insets --> Spacer, to * allow for relative or absolute spacing (DG); * 26-Sep-2002 : Fixed errors reported by Checkstyle (DG); * 31-Jan-2005 : Updated for changes to super class (DG); * ------------- JFREECHART 1.0.x --------------------------------------------- * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG); * */ package org.jfree.chart.title; import java.awt.Color; import java.awt.Font; import java.awt.Paint; import java.io.Serializable; import java.text.DateFormat; import java.util.Date; import java.util.Locale; import org.jfree.ui.HorizontalAlignment; import org.jfree.ui.RectangleEdge; import org.jfree.ui.RectangleInsets; import org.jfree.ui.VerticalAlignment; /** * A chart title that displays the date. * <p> * Keep in mind that a chart can have several titles, and that they can appear * at the top, left, right or bottom of the chart - a {@code DateTitle} * will commonly appear at the bottom of a chart, although you can place it * anywhere. * <P> * By specifying the locale, dates are formatted to the correct standard for * the given locale. For example, a date would appear as "January 17, 2000" in * the US, but "17 January 2000" in most European locales. */ public class DateTitle extends TextTitle implements Serializable { /** For serialization. */ private static final long serialVersionUID = -465434812763159881L; /** * Creates a new chart title that displays the current date in the default * (LONG) format for the locale, positioned to the bottom right of the * chart. * <P> * The color will be black in 12 point, plain Helvetica font (maps to Arial * on Win32 systems without Helvetica). */ public DateTitle() { this(DateFormat.LONG); } /** * Creates a new chart title that displays the current date with the * specified style (for the default locale). * <P> * The date style should be one of: {@code SHORT}, * {@code MEDIUM}, {@code LONG} or {@code FULL} * (defined in {@code java.util.DateFormat}). * * @param style the date style. */ public DateTitle(int style) { this(style, Locale.getDefault(), new Font("Dialog", Font.PLAIN, 12), Color.black); } /** * Creates a new chart title that displays the current date. * <p> * The date style should be one of: {@code SHORT}, * {@code MEDIUM}, {@code LONG} or {@code FULL} (defined * in {@code java.util.DateFormat}). * <P> * For the locale, you can use {@code Locale.getDefault()} for the * default locale. * * @param style the date style. * @param locale the locale. * @param font the font. * @param paint the text color. */ public DateTitle(int style, Locale locale, Font font, Paint paint) { this(style, locale, font, paint, RectangleEdge.BOTTOM, HorizontalAlignment.RIGHT, VerticalAlignment.CENTER, Title.DEFAULT_PADDING); } /** * Creates a new chart title that displays the current date. * <p> * The date style should be one of: {@code SHORT}, * {@code MEDIUM}, {@code LONG} or {@code FULL} (defined * in {@code java.util.DateFormat}). * <P> * For the locale, you can use {@code Locale.getDefault()} for the * default locale. * * @param style the date style. * @param locale the locale. * @param font the font (not null). * @param paint the text color (not null). * @param position the relative location of this title (use constants in * Title). * @param horizontalAlignment the horizontal text alignment of this title * (use constants in Title). * @param verticalAlignment the vertical text alignment of this title (use * constants in Title). * @param padding determines the blank space around the outside of the * title (not null). */ public DateTitle(int style, Locale locale, Font font, Paint paint, RectangleEdge position, HorizontalAlignment horizontalAlignment, VerticalAlignment verticalAlignment, RectangleInsets padding) { super(DateFormat.getDateInstance(style, locale).format(new Date()), font, paint, position, horizontalAlignment, verticalAlignment, padding); } /** * Set the format of the date. * <P> * The date style should be one of: {@code SHORT}, * {@code MEDIUM}, {@code LONG} or {@code FULL} (defined * in {@code java.util.DateFormat}). * <P> * For the locale, you can use {@code Locale.getDefault()} for the * default locale. * * @param style the date style. * @param locale the locale. */ public void setDateFormat(int style, Locale locale) { setText(DateFormat.getDateInstance(style, locale).format(new Date())); } }