Java File Extension Name Get getFileExtension(File file)

Description

Get the file extension of a file

License

Apache License

Parameter

Parameter	Description
file	a parameter

Return

file extension

Declaration

public static String getFileExtension(File file) 

Method Source Code

//package com.java2s;
/**/*from  w w  w .  j  ava  2 s .  c o m*/
 *  Copyright 2009 Welocalize, 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 {
    /**
     * Get the file extension of a file
     * @param file
     * @return file extension
     */
    public static String getFileExtension(File file) {
        if (file != null) {
            String fileName = file.getName();
            if (fileName.lastIndexOf(".") != -1) {
                String extension = fileName.substring(fileName.lastIndexOf(".") + 1);
                return extension;
            } else {
                return "";
            }
        } else {
            return null;
        }
    }
}

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)