Java File Extension Name Get getFileExtension(File f)

Description

get File Extension

License

Open Source License

Declaration

public static String getFileExtension(File f) 

Method Source Code

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

import java.io.File;

public class Main {
    public static String getFileExtension(File f) {
        String ext = null;//from ww w .  j a v a  2  s .  com
        String str = f.getName();
        int ind = str.lastIndexOf('.');

        if (ind > 0 && ind < str.length() - 1) {
            ext = str.substring(ind + 1).toLowerCase();
        }
        return ext;
    }
}

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