Here you can find the source of areEqualIgnoreCase(String s1, String s2)
public static boolean areEqualIgnoreCase(String s1, String s2)
//package com.java2s; /**/*from w ww . jav a 2s .c om*/ * $Revision $ * $Date $ * * Copyright (C) 2005-2010 Jive Software. All rights reserved. * * Licensed 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. */ public class Main { public static boolean areEqualIgnoreCase(String s1, String s2) { if (s1 == null && s2 == null) return true; if (s1 != null) { s1 = s1.toLowerCase(); return s2 != null && s1.equals(s2.toLowerCase()); } else { return false; } } }