Java String Camel Case Format toCamelCase(String value)

Description

to Camel Case

License

Apache License

Declaration

private static String toCamelCase(String value) 

Method Source Code

//package com.java2s;
/*/*from   w w  w .j av  a2s  .  c  o  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 {
    private static String toCamelCase(String value) {
        StringBuilder camelCase = new StringBuilder();
        char[] characters = value.toCharArray();

        for (int i = 0; i < characters.length; i++) {
            i = ignoreWhitespace(characters, i);
            if (i == -1)
                break;

            if (camelCase.length() == 0)
                camelCase.append(Character.toLowerCase(characters[i]));
            else
                camelCase.append(Character.toUpperCase(characters[i]));

            int nextWhitespace = nextWhitespace(characters, i);
            if (nextWhitespace == -1)
                nextWhitespace = characters.length;

            camelCase.append(value.substring(i + 1, nextWhitespace));
            i = nextWhitespace;
        }

        return camelCase.toString();
    }

    private static int ignoreWhitespace(char[] characters, int offset) {
        for (int i = offset; i < characters.length; i++) {
            char c = characters[i];
            if (!Character.isWhitespace(c) && '-' != c && '_' != c)
                return i;
        }
        return -1;
    }

    private static int nextWhitespace(char[] characters, int offset) {
        for (int i = offset + 1; i < characters.length; i++) {
            char c = characters[i];
            if (Character.isWhitespace(c) || '-' == c || '_' == c)
                return i;
        }
        return -1;
    }
}

Related

1. toCamelCase(String stringValue, String delimiter)
2. toCamelCase(String text)
3. toCamelCase(String text)
4. toCamelCase(String text)
5. toCamelCase(String text, boolean capFirstLetter)
6. toCamelCase(String value)
7. toCamelCase(String value)
8. toCamelCase(String value)
9. toCamelCase(String value)