Java File Extension Name Get extractExtension(String strFilename)

Description

Extracts file extension from filename.

License

Mozilla Public License

Declaration

public static String extractExtension(String strFilename) 

Method Source Code

//package com.java2s;
/*/* ww  w  .  ja  v a  2s . com*/
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is "EINRC-7 / GDEM project".
 *
 * The Initial Developer of the Original Code is TietoEnator.
 * The Original Code code was developed for the European
 * Environment Agency (EEA) under the IDA/EINRC framework contract.
 *
 * Copyright (C) 2000-2004 by European Environment Agency.  All
 * Rights Reserved.
 *
 * Original Code: Kaido Laine (TietoEnator)
 */

public class Main {
    /**
     * Extracts file extension from filename.
     */
    public static String extractExtension(String strFilename) {
        return extractExtension(strFilename, "xml");
    }

    public static String extractExtension(String strFilename, String defaultExt) {
        String strExtension = "";
        int index = strFilename.lastIndexOf('.');
        // if the "." is before the 5 chars at the end of file name, then it's
        // not probably a file name
        if (index > strFilename.length() - 5) {
            strExtension = strFilename.substring(index + 1, strFilename.length());
            strExtension = strExtension.toLowerCase();
            return strExtension;
        }
        return defaultExt;
    }
}

Related

1. extractExtension(final String fileName)
2. extractExtension(String fileName)
3. extractExtension(String name)
4. extractExtension(String s)
5. extractExtension(String url)
6. extractExtensions(String fileName)
7. fileExt(String name)
8. fileExt(String url)