Java File Extension Name Extract getFileExtension(File file, boolean includeDelimiter)

Description

Return the extension part given file name.

License

BSD License

Parameter

Parameter	Description
file	a parameter
includeDelimiter	a parameter

Return

the extension or an empty string if nothing is found

Declaration

public static final String getFileExtension(File file, boolean includeDelimiter) 

Method Source Code

//package com.java2s;
/*L//  w ww. j a  v  a2  s  . co m
 * Copyright SAIC, SAIC-Frederick.
 *
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/caadapter/LICENSE.txt for details.
 */

import java.io.*;

public class Main {
    /**
     * Return the extension part given file name.
     * For example, if the name of the file is "foo.bar", ".bar" will be returned
     * if includeDelimiter is true, or "bar" will be returned if includeDelimiter is false;
     * otherwise, if no extension is specified in the file name, empty string is
     * returned instead of null.
     *
     * @param file
     * @param includeDelimiter
     * @return the extension or an empty string if nothing is found
     */
    public static final String getFileExtension(File file, boolean includeDelimiter) {
        String result = "";
        if (file != null) {
            String absoluteName = file.getAbsolutePath();
            if (absoluteName != null) {
                int delimIndex = absoluteName.lastIndexOf(".");
                if (delimIndex != -1) {//include the . delimiter
                    if (!includeDelimiter) {//skip the . delimiter
                        delimIndex++;
                    }
                    result = absoluteName.substring(delimIndex);
                }
            }
        }
        return result;
    }
}

Related

1. getFileExtension(File file)
2. getFileExtension(File file)
3. getFileExtension(File file)
4. getFileExtension(File file)
5. getFileExtension(File file)
6. getFileExtension(File fx)
7. getFileExtension(File path)
8. getFileExtension(final String fileName)
9. getFileExtension(final String filenamePath)