1/* 2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.tools.javac.util; 27 28import java.util.Locale; 29import java.util.regex.Matcher; 30import java.util.regex.Pattern; 31 32/** A collection of utilities for String manipulation. 33 * 34 * <p><b>This is NOT part of any supported API. 35 * If you write code that depends on this, you do so at your own risk. 36 * This code and its internal interfaces are subject to change or 37 * deletion without notice.</b> 38 */ 39public class StringUtils { 40 41 /**Converts the given String to lower case using the {@link Locale#US US Locale}. The result 42 * is independent of the default Locale in the current JVM instance. 43 */ 44 public static String toLowerCase(String source) { 45 return source.toLowerCase(Locale.US); 46 } 47 48 /**Converts the given String to upper case using the {@link Locale#US US Locale}. The result 49 * is independent of the default Locale in the current JVM instance. 50 */ 51 public static String toUpperCase(String source) { 52 return source.toUpperCase(Locale.US); 53 } 54 55 /**Case insensitive version of {@link String#indexOf(java.lang.String)}. Equivalent to 56 * {@code text.indexOf(str)}, except the matching is case insensitive. 57 */ 58 public static int indexOfIgnoreCase(String text, String str) { 59 return indexOfIgnoreCase(text, str, 0); 60 } 61 62 /**Case insensitive version of {@link String#indexOf(java.lang.String, int)}. Equivalent to 63 * {@code text.indexOf(str, startIndex)}, except the matching is case insensitive. 64 */ 65 public static int indexOfIgnoreCase(String text, String str, int startIndex) { 66 Matcher m = Pattern.compile(Pattern.quote(str), Pattern.CASE_INSENSITIVE).matcher(text); 67 return m.find(startIndex) ? m.start() : -1; 68 } 69 70} 71