Java String Underscore underscoreCase(String s)

Description

underscore Case

License

Apache License

Declaration

static String underscoreCase(String s) 

Method Source Code

//package com.java2s;
/*/*from w ww .j  a  va 2  s. com*/
 * Copyright (C) 2011 Google Inc.
 *
 * 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 {
    static String underscoreCase(String s) {
        if (s.isEmpty()) {
            return s;
        }
        StringBuilder sb = new StringBuilder();
        char[] chars = s.toCharArray();
        sb.append(chars[0]);
        for (int i = 1; i < chars.length; i++) {
            char ch = chars[i];
            if (Character.isUpperCase(ch)
                    && Character.isLowerCase(chars[i - 1])) {
                sb.append('_');
            }
            sb.append(ch);
        }
        return sb.toString();
    }
}

Related

1. underscore(String str)
2. underscore(String word)
3. underscoreAllWhitespace(String str)
4. underscoreAndLowercase(String s)
5. underScoreBreakToCaseBreak (final String s)
6. underScoreCase2CamelCase(String str)
7. underscored(String string)
8. underscoredToCamel(String string)
9. underscoreName(String camelCaseName)