Java String Camel Case to Underscore camelCaseToUnderscore(String camelCase)

Description

Turns CamelCased string into Underscored one

License

Open Source License

Parameter

Parameter	Description
camelCase	a parameter

Declaration

public static String camelCaseToUnderscore(String camelCase) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2011 - 2014 DigiArea, Inc. and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*  w  w  w.  j a v a 2s  . c  o m*/
 *     DigiArea, Inc. - initial API and implementation
 *******************************************************************************/

public class Main {
    /**
     * Turns CamelCased string into Underscored one
     * 
     * @param camelCase
     * @return
     */
    public static String camelCaseToUnderscore(String camelCase) {
        StringBuilder builder = new StringBuilder();
        char[] chars = camelCase.toCharArray();
        for (int j = 0; j < chars.length; j++) {
            if (Character.isUpperCase(chars[j])) {
                if (j != 0) {
                    builder.append('_');
                }
                builder.append(Character.toLowerCase(chars[j]));
            } else {
                builder.append(chars[j]);
            }
        }
        return builder.toString();
    }
}

Related

1. camelCase2UnderscoreLowercase(String name)
2. camelCaseToLowerCaseUnderline(String name)
3. camelCaseToUnderline(String name)
4. camelCaseToUnderscore(final String camelCaseString)
5. camelCaseToUnderscore(final String str)
6. camelCaseToUnderscore(String camelCased)
7. camelCaseToUnderScore(String key)
8. camelCaseToUnderscored(String camelCaseName)
9. camelCaseToUnderscores(String camel)