Java File Extension Name Get getFileExtension(File f)

Description

Get the file extension (if present).

License

Open Source License

Parameter

Parameter	Description
f	A file object.

Return

The file extension (containing no dots), or an empty string.

Declaration

public static String getFileExtension(File f) 

Method Source Code

//package com.java2s;
/*//from   ww w  .j  ava 2s . co m
 * Copyright (C) 2006-2014  Gabriel Burca (gburca dash virtmus at ebixio dot com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import java.io.File;

public class Main {
    /** Get the file extension (if present). The file extension is the portion
     * after the LAST dot.
     *
     * @param f A file object.
     * @return The file extension (containing no dots), or an empty string. */
    public static String getFileExtension(File f) {
        return getFileExtension(f.getName());
    }

    public static String getFileExtension(String s) {
        int i = s.lastIndexOf('.');
        if (i > 0 && i < s.length() - 1) {
            return s.substring(i + 1);
        } else {
            return "";
        }
    }
}

Related

1. fileExtension(CharSequence path)
2. fileExtension(String filename)
3. fileExtension(String path)
4. getFileExtension(File _file)
5. getFileExtension(File f)
6. getFileExtension(File f)
7. getFileExtension(File f)
8. getFileExtension(File f)
9. getFileExtension(File f)