Java File Extension Name Get getFileExtension(File file)

Description

returns the file extension, or empty-string of the file has no extension.

License

Open Source License

Parameter

Parameter	Description
file	a parameter

Declaration

public static String getFileExtension(File file) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.*;

public class Main {
    private static final String DOT = ".";

    /**/*from   w  w w .java 2 s. co  m*/
     * returns the file extension, or empty-string of the file has no extension.
     * @param file
     * @return
     */
    public static String getFileExtension(File file) {
        String filePath = file.getPath();
        int index = filePath.lastIndexOf(DOT);
        if (index >= 0)
            return filePath.substring(index + 1);
        else
            return "";
    }
}

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