Java String Uncapitalize uncapitalize(String str)

Description

Uncapitalizes all the whitespace separated words in a String.

License

Apache License

Parameter

Parameter	Description
str	the String to uncapitalize, may be null

Return

uncapitalized String, null if null String input

Declaration

public static String uncapitalize(String str) 

Method Source Code

//package com.java2s;
/*/*from   ww  w .j a  va 2 s .co  m*/
 * 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.
 */

public class Main {
    /**
     * <p>Uncapitalizes all the whitespace separated words in a String.
     * Only the first letter of each word is changed.</p>
     *
     * <p>Whitespace is defined by {@link Character#isWhitespace(char)}.
     * A <code>null</code> input String returns <code>null</code>.</p>
     *
     * <pre>
     * WordUtils.uncapitalize(null)        = null
     * WordUtils.uncapitalize("")          = ""
     * WordUtils.uncapitalize("I Am FINE") = "i am fINE"
     * </pre>
     * 
     * @param str  the String to uncapitalize, may be null
     * @return uncapitalized String, <code>null</code> if null String input
     * @see #capitalize(String)
     */
    public static String uncapitalize(String str) {
        return uncapitalize(str, null);
    }

    /**
     * <p>Uncapitalizes all the whitespace separated words in a String.
     * Only the first letter of each word is changed.</p>
     *
     * <p>The delimiters represent a set of characters understood to separate words.
     * The first string character and the first non-delimiter character after a
     * delimiter will be uncapitalized. </p>
     *
     * <p>Whitespace is defined by {@link Character#isWhitespace(char)}.
     * A <code>null</code> input String returns <code>null</code>.</p>
     *
     * <pre>
     * WordUtils.uncapitalize(null, *)            = null
     * WordUtils.uncapitalize("", *)              = ""
     * WordUtils.uncapitalize(*, null)            = *
     * WordUtils.uncapitalize(*, new char[0])     = *
     * WordUtils.uncapitalize("I AM.FINE", {'.'}) = "i AM.fINE"
     * </pre>
     * 
     * @param str  the String to uncapitalize, may be null
     * @param delimiters  set of characters to determine uncapitalization, null means whitespace
     * @return uncapitalized String, <code>null</code> if null String input
     * @see #capitalize(String)
     * @since 2.1
     */
    public static String uncapitalize(String str, char... delimiters) {
        int delimLen = delimiters == null ? -1 : delimiters.length;
        char[] buffer = str.toCharArray();
        boolean uncapitalizeNext = true;
        for (int i = 0; i < buffer.length; i++) {
            char ch = buffer[i];
            if (isDelimiter(ch, delimiters)) {
                uncapitalizeNext = true;
            } else if (uncapitalizeNext) {
                buffer[i] = Character.toLowerCase(ch);
                uncapitalizeNext = false;
            }
        }
        return new String(buffer);
    }

    /**
     * Is the character a delimiter.
     *
     * @param ch  the character to check
     * @param delimiters  the delimiters
     * @return true if it is a delimiter
     */
    private static boolean isDelimiter(char ch, char[] delimiters) {
        if (delimiters == null) {
            return Character.isWhitespace(ch);
        }
        for (char delimiter : delimiters) {
            if (ch == delimiter) {
                return true;
            }
        }
        return false;
    }
}

Related

1. unCapitalize(String str)
2. uncapitalize(String str)
3. uncapitalize(String str)
4. uncapitalize(String str)
5. uncapitalize(String str)
6. uncapitalize(String str)
7. uncapitalize(String str)
8. uncapitalize(String str)
9. uncapitalize(String str)