Java tutorial
//package com.java2s; /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Spindle, an Eclipse Plugin for Tapestry. * * The Initial Developer of the Original Code is * Geoffrey Longman. * Portions created by the Initial Developer are Copyright (C) 2001-2005 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * glongman@gmail.com * * ***** END LICENSE BLOCK ***** */ public class Main { private static String convert(String string) { if (string == null && string.trim().length() == 0) return ""; StringBuffer buffer = new StringBuffer(); final char[] characters = string.toCharArray(); for (int i = 0; i < characters.length; i++) { switch (characters[i]) { case '<': buffer.append("<"); break; case '>': buffer.append(">"); break; case '&': buffer.append("&"); break; default: buffer.append(characters[i]); break; } } return buffer.toString(); } }