Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {

    public static String getFileExtensionName(String fileName) {
        String extensionName = "";
        if (!isEmpty(fileName) && fileName.lastIndexOf(".") >= 0) {
            extensionName = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
        }
        return extensionName;
    }

    public static boolean isEmpty(String input) {
        if (input == null || "".equals(input) || "null".equals(input.toLowerCase()))
            return true;

        for (int i = 0; i < input.length(); i++) {
            char c = input.charAt(i);
            if (c != ' ' && c != '\t' && c != '\r' && c != '\n') {
                return false;
            }
        }
        return true;
    }
}