dateutilities.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 96 行

/* ===================================================
 * JCommon : a free general purpose Java class library
 * ===================================================
 *
 * Project Info:  http://www.jfree.org/jcommon/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * ------------------
 * DateUtilities.java
 * ------------------
 * (C) Copyright 2002, 2003, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: DateUtilities.java,v 1.2 2005/06/01 14:12:28 taqua Exp $
 *
 * Changes
 * -------
 * 11-Oct-2002 : Version 1 (DG);
 * 03-Apr-2003 : Added clear() method call (DG)
 *
 */

package org.jfree.date;

import java.util.Calendar;
import java.util.Date;

/**
 * Some useful date methods.
 *
 * @author David Gilbert.
 */
public class DateUtilities {

    /**
     * Private constructor to prevent object creation.
     */
    private DateUtilities() {
    }

    /** A working calendar. */
    private static final Calendar CALENDAR = Calendar.getInstance();

    /**
     * Creates a date.
     *
     * @param yyyy  the year.
     * @param month  the month (1 - 12).
     * @param day  the day.
     *
     * @return a date.
     */
    public static synchronized Date createDate(final int yyyy, final int month, final int day) {
        CALENDAR.clear();
        CALENDAR.set(yyyy, month - 1, day);
        return CALENDAR.getTime();
    }

    /**
     * Creates a date.
     *
     * @param yyyy  the year.
     * @param month  the month (1 - 12).
     * @param day  the day.
     * @param hour  the hour.
     * @param min  the minute.
     *
     * @return a date.
     */
    public static synchronized Date createDate(final int yyyy, final int month, final int day, final int hour, final int min) {

        CALENDAR.clear();
        CALENDAR.set(yyyy, month - 1, day, hour, min);
        return CALENDAR.getTime();

    }


}