Java File Extension Name Get getFileExtension(File file)

Description

Returns the extension of the file.

License

Apache License

Parameter

Parameter	Description
file	a parameter

Return

extension

Declaration

public static String getFileExtension(File file) 

Method Source Code

//package com.java2s;
/*/*from  w  w  w  . j a va 2  s  . c o m*/
 *    Copyright 2016 Roche NimbleGen Inc.
 *
 *  Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

import java.io.File;

public class Main {
    /**
     * Returns the extension of the file. Returns an empty string if no extension is found.
     * 
     * @param file
     * @return extension
     */
    public static String getFileExtension(File file) {
        return getFileExtension(file.getName());
    }

    /**
     * Returns the extension of the file name. Returns an empty string if no extension is found.
     * 
     * @param fileName
     * @return extension
     */
    public static String getFileExtension(String fileName) {
        String extension = "";
        int index = fileName.lastIndexOf('.');

        if ((index >= 0) && (index < fileName.length())) {
            extension = fileName.substring(index + 1, fileName.length());
        }

        return extension;
    }
}

Related

1. getFileExtension(File file)
2. getFileExtension(File file)
3. getFileExtension(File file)
4. getFileExtension(File file)
5. getFileExtension(File file)
6. getFileExtension(File file)
7. getFileExtension(File file)
8. getFileExtension(File file)
9. getFileExtension(File file)