Here you can find the source of convertStringToId(String s)
public static String convertStringToId(String s)
//package com.java2s; /******************************************************************************* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (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.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License./*from www .j a v a 2s .co m*/ *******************************************************************************/ public class Main { public static String convertStringToId(String s) { StringBuilder sb = new StringBuilder(s.length()); for (int i = 0; i != s.length(); i++) { char c = s.charAt(i); if (Character.isLetterOrDigit(c)) { sb.append(c); } } return sb.toString().toLowerCase(); } }