Java String Camel Case to Snake Case camelToSnake(String value)

Description

camel To Snake

License

MIT License

Declaration

public static String camelToSnake(String value) 

Method Source Code

//package com.java2s;
/*/*w  w  w.j a  va  2 s  . com*/
 * This file is part of LanternServer, licensed under the MIT License (MIT).
 *
 * Copyright (c) LanternPowered <https://www.lanternpowered.org>
 * Copyright (c) SpongePowered <https://www.spongepowered.org>
 * Copyright (c) contributors
 *
 * 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 {
    public static String camelToSnake(String value) {
        final char[] name = value.toCharArray();
        final StringBuilder builder = new StringBuilder();

        for (int i = 0; i < name.length; i++) {
            if (Character.isUpperCase(name[i]) || name[i] == '.' || name[i] == '$') {
                if (i != 0 && name[i - 1] != '.' && name[i - 1] != '$') {
                    builder.append('_');
                }
                if (name[i] != '.' && name[i] != '$') {
                    builder.append(Character.toLowerCase(name[i]));
                }
            } else {
                builder.append(name[i]);
            }
        }

        return builder.toString();
    }
}

Related

1. camelToSnake(final String camelStr)
2. camelToSnake(String camel, boolean upper)
3. camelToSnakeCase(final String camelCase)
4. camelToSnakeCase(String camelcase)
5. camelToSnakeCase(String string)
6. camelToSneakCase(String name)