Here you can find the source of sanitizeString(String dirtyString)
protected static String sanitizeString(String dirtyString)
//package com.java2s; /*// ww w . j av a 2 s. c o m * Copyright (C) 2015 jlgranda * * 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 { protected static String sanitizeString(String dirtyString) { StringBuilder sb = new StringBuilder(dirtyString.length()); for (int i = 0; i < dirtyString.length(); i++) { if (!Character.isIdentifierIgnorable(dirtyString.charAt(i))) { sb.append(dirtyString.charAt(i)); } } return sb.toString(); } }