Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static String getFileExtension(String filename) {
        String extension = "";
        if (filename != null) {
            int dotPos = filename.lastIndexOf(".");
            if (dotPos >= 0 && dotPos < filename.length() - 1) {
                extension = filename.substring(dotPos + 1);
            }
        }
        return extension.toLowerCase();
    }
}