Here you can find the source of containsIgnoreCase(Collection
public static boolean containsIgnoreCase(Collection<String> c, String str)
//package com.java2s; /*//from w ww . j a va2 s.com * Copyright: (c) 2004-2010 Mayo Foundation for Medical Education and * Research (MFMER). All rights reserved. MAYO, MAYO CLINIC, and the * triple-shield Mayo logo are trademarks and service marks of MFMER. * * Except as contained in the copyright notice above, or as used to identify * MFMER as the author of this software, the trade names, trademarks, service * marks, or product names of the copyright holder shall not be used in * advertising, promotion or otherwise in connection with this software without * prior written authorization of the copyright holder. * * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html * */ import java.util.Collection; import java.util.Iterator; public class Main { public static boolean containsIgnoreCase(Collection<String> c, String str) { Iterator<String> it = c.iterator(); while (it.hasNext()) { String temp = it.next(); if (temp.equalsIgnoreCase(str)) { return true; } } return false; } }