Java String Decamel Case decamelize(final String s)

Description

decamelize

License

Apache License

Declaration

public static String decamelize(final String s) 

Method Source Code

//package com.java2s;
/*/*from  w ww  .  j a v  a2  s  .co m*/
 * Copyright 2014 kohii.
 * 
 * Licensed 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 {
    public static String decamelize(final String s) {
        if (s == null) {
            return null;
        }
        if (s.length() == 1) {
            return s.toUpperCase();
        }
        StringBuilder buf = new StringBuilder(40);
        int pos = 0;
        for (int i = 1; i < s.length(); ++i) {
            if (Character.isUpperCase(s.charAt(i))) {
                if (buf.length() != 0) {
                    buf.append('_');
                }
                buf.append(s.substring(pos, i).toUpperCase());
                pos = i;
            }
        }
        if (buf.length() != 0) {
            buf.append('_');
        }
        buf.append(s.substring(pos, s.length()).toUpperCase());
        return buf.toString();
    }
}

Related

1. deCamelCase(final String original)
2. deCamelCase(String camelCased, String delim)
3. deCamelCase(String identifier)
4. deCamelCaseStyle(String style)
5. decamelise(String testName)
6. decamelize(String s)
7. deCamelize(String value)
8. decamelizeAndReplaceByHyphen(String s)