Java Year From getYearFromISODate(String isoDate)

Description

Method to return the year part from an iso date in either yyyy, yyyy-mm, or yyyy-mm-dd

License

Open Source License

Parameter

Parameter	Description
isoDate	a parameter

Return

the year from an iso date

Declaration

public static Integer getYearFromISODate(String isoDate) 

Method Source Code

//package com.java2s;
/**//w  ww.ja va2 s.c  o m
 * Archivists' Toolkit(TM) Copyright 2005-2007 Regents of the University of California, New York University, & Five Colleges, Inc.
 * All rights reserved.
 *
 * This software is free. You can redistribute it and / or modify it under the terms of the Educational Community License (ECL)
 * version 1.0 (http://www.opensource.org/licenses/ecl1.php)
 *
 * This software 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 ECL license for more details about permissions and limitations.
 *
 *
 * Archivists' Toolkit(TM)
 * http://www.archiviststoolkit.org
 * info@archiviststoolkit.org
 *
 *
 * Simple utility class for checking that an entered date is valid for the given database
 * and for handeling iso dates in the AT
 *
 * Created by IntelliJ IDEA.
 * User: Nathan Stevens
 * Date: Aug 28, 2008
 * Time: 10:46:58 AM
 * To change this template use File | Settings | File Templates.
 */

public class Main {
    /**
     * Method to return the year part from an iso date in either
     * yyyy, yyyy-mm, or yyyy-mm-dd
     * @param isoDate
     * @return the year from an iso date
     */
    public static Integer getYearFromISODate(String isoDate) {
        Integer year = null;

        if (isoDate.matches("\\d{4}")) { // must just be year
            year = new Integer(isoDate);
        } else if (isoDate.matches("\\d{4}-\\d{2}")
                || isoDate.matches("\\d{4}-\\d{2}-\\d{2}")) {
            String[] sa = isoDate.split("-");
            year = new Integer(sa[0]);
        } else if (isoDate.matches("\\d{8}")) { //looks like YYYYMMDD
            String stringYear = isoDate.substring(0, 4);
            year = new Integer(stringYear);
        }

        return year;
    }
}

Related

1. getYear(long t)
2. getYearBegin(int year)
3. getYearFirst(int year)
4. getYearFormat(String dateString)
5. getYearFromDay(int days)
6. getYearFromTimestamp(long ms)
7. getYearFromWeekCode(String weekCode)
8. getYearFromYM(String ym)
9. getYearMonth(String day)