Java tutorial
//package com.java2s; /* * Copyright (C) 2002-2006 Stefan Stiller * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ public class Main { public static boolean isXMLName(String text) { if (text == null || text.length() <= 0) return false; if (!Character.isLetter(text.charAt(0))) return false; for (int i = 0; i < text.length(); i++) { char ch = text.charAt(i); if (Character.isLetter(ch)) continue; if (Character.isDigit(ch)) continue; if (ch == '.' || ch == ':' || ch == '_' || ch == '-') continue; return false; } return true; } }