Here you can find the source of capitalize(String str)
Capitalizes all the whitespace separated words in a String.
Parameter | Description |
---|---|
str | the String to capitalize, may be null |
null
if null String input
public static String capitalize(String str)
//package com.java2s; /* ==================================================================== * The Apache Software License, Version 1.1 * * Copyright (c) 2002-2003 The Apache Software Foundation. All rights * reserved./*from ww w.j a v a 2s . co m*/ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, if * any, must include the following acknowledgement: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgement may appear in the software itself, * if and wherever such third-party acknowledgements normally appear. * * 4. The names "The Jakarta Project", "Commons", and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact apache@apache.org. * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */ public class Main { /** * <p> * Capitalizes all the whitespace separated words in a String. Only the * first letter of each word is changed. To change all letters to the * capitalized case, use {@link #capitalizeFully(String)}. * </p> * * <p> * Whitespace is defined by {@link Character#isWhitespace(char)}. A * <code>null</code> input String returns <code>null</code>. * Capitalization uses the unicode title case, normally equivalent to upper * case. * </p> * * <pre> * * WordUtils.capitalize(null) = null * WordUtils.capitalize("") = "" * WordUtils.capitalize("i am FINE") = "I Am FINE" * * </pre> * * @param str * the String to capitalize, may be null * @return capitalized String, <code>null</code> if null String input * @see #uncapitalize(String) * @see #capitalizeFully(String) */ public static String capitalize(String str) { int strLen; if (str == null || (strLen = str.length()) == 0) { return str; } StringBuffer buffer = new StringBuffer(strLen); boolean whitespace = true; for (int i = 0; i < strLen; i++) { char ch = str.charAt(i); if (Character.isWhitespace(ch)) { buffer.append(ch); whitespace = true; } else if (whitespace) { buffer.append(Character.toTitleCase(ch)); whitespace = false; } else { buffer.append(ch); } } return buffer.toString(); } }