Write code to Return a new string created from the input string through the character order reversing.
//package com.book2s; public class Main { public static void main(String[] argv) { String txt = "book2s.com"; System.out.println(reverseString(txt)); }/*from w w w . j a v a2 s .co m*/ /** * Returns a new string created from the input string through the character order reversing. * * @param txt The input string. * * @return The string containing characters in reverse order. */ public static String reverseString(final String txt) { if (txt == null) { throw new NullPointerException( "Cannt perform reverse operation on null string."); } StringBuilder tmp = new StringBuilder(txt); return tmp.reverse().toString(); } }