Java String Camel Case Format toCamelCase(String str)

Description

Converts a string to camel case.

License

Open Source License

Parameter

Parameter	Description
str	The string to convert.

Return

The camel case version of str.

Declaration

public static String toCamelCase(String str) 

Method Source Code

//package com.java2s;
/**//www  .jav a 2  s .  c o m
 * Copyright (c) 2009, 2010 jDORM, http://www.jdorm.com
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

public class Main {
    /**
     * Converts a string to camel case. This will remove spaces and underscores
     * and replace the character following them with its uppercase version.
     * 
     * @param   str   The string to convert.
     * 
     * @return   The camel case version of str.
     */
    public static String toCamelCase(String str) {
        str = str.trim();
        StringBuilder builder = new StringBuilder();
        boolean shouldUppercase = false;
        for (int i = 0; i < str.length(); i++) {
            char currChar = str.charAt(i);
            if (Character.isWhitespace(currChar) || currChar == '_') {
                shouldUppercase = true;
            } else {
                if (i == 0 || shouldUppercase) {
                    builder.append(Character.toUpperCase(currChar));
                    shouldUppercase = false;
                } else {
                    builder.append(Character.toLowerCase(currChar));
                }
            }
        }
        return builder.toString();
    }
}

Related

1. toCamelCase(String start)
2. toCamelCase(String str)
3. toCamelCase(String str)
4. toCamelCase(String str)
5. toCamelCase(String str)
6. toCamelCase(String str)
7. toCamelCase(String str)
8. toCamelCase(String str, boolean firstCapital)
9. toCamelCase(String string)