Java Date Value Check isValidDatePattern(String pattern)

Description

is Valid Date Pattern

License

Open Source License

Declaration

public static boolean isValidDatePattern(String pattern) 

Method Source Code

//package com.java2s;
/*//from  ww w  .  j  a  v  a2  s  .  co m
 * Copyright (C) 2005-2007 Oleh Hapon ohapon@users.sourceforge.net
 * 
 * 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.
 * 
 * Oleh Hapon
 * Kyiv, UKRAINE
 * ohapon@users.sourceforge.net
 */

import java.text.SimpleDateFormat;

public class Main {
    public static boolean isValidDatePattern(String pattern) {
        return isValidDatePattern(pattern, null);
    }

    public static boolean isValidDatePattern(String pattern, String charSequence) {
        boolean isValid = isValidPattern(pattern, charSequence);
        if (!isValid) {
            return isValid;
        }
        isValid = false;
        try {
            validateDatePattern(pattern);
            isValid = true;
        } catch (IllegalArgumentException ex) {

        }
        return isValid;
    }

    public static boolean isValidPattern(String pattern) {
        return isValidPattern(pattern, null);
    }

    public static boolean isValidPattern(String pattern, String charSequence) {
        if (pattern == null || pattern.trim().length() == 0) {
            return false;
        }
        if (charSequence != null && charSequence.trim().length() != 0) {
            char[] patternArray = pattern.toCharArray();
            char[] charArray = charSequence.toCharArray();
            for (int i = 0; i < patternArray.length; i++) {
                boolean b = false;
                for (int j = 0; j < charArray.length; j++) {
                    if (patternArray[i] == charArray[j]) {
                        b = true;
                        break;
                    }
                }
                if (!b) {
                    return false;
                }
            }

        }
        return true;
    }

    public static void validateDatePattern(String pattern) {
        new SimpleDateFormat(pattern);
    }
}

Related

1. isValidDate(String src, String format)
2. isValidDate(String value)
3. isValidDateFormat(String startDate)
4. isValidDateFormat(String strDate, String dataFormat)
5. isValidDateInternal(String date, String dateFormat)
6. isValidDatePatterns(String dateStr, String patterns)
7. isValidDateStr(String date, String format)
8. isValidGameDate(String gameDate)
9. isValidLongDateFormat(String strDate)