Write code to check if a file name has Extension
//package com.book2s; public class Main { public static void main(String[] argv) { String filename = "book2s.com"; String ext = "book2s.com"; System.out.println(hasExtension(filename, ext)); }// ww w . java 2 s . co m public static boolean hasExtension(String filename, String ext) { int index = filename.lastIndexOf("."); if (index == -1) return (false); return (filename.substring(index + 1).compareTo(ext) == 0); } }