Write code to remove Non Letter Or Digits
//package com.book2s; public class Main { public static void main(String[] argv) { String string = "book2s.com"; System.out.println(removeNonLetterOrDigits(string)); }// w w w . j av a 2s. co m public static String removeNonLetterOrDigits(String string) { StringBuilder builder = new StringBuilder(string); for (int i = 0; i < builder.length(); i++) { char c = builder.charAt(i); if (!(Character.isLetterOrDigit(c) || Character.isWhitespace(c)) || c == '\'') { builder.deleteCharAt(i); i--; } } return builder.toString(); } }