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Rune Common is a java library that is utilised by Rosetta Code Generators and models expressed in the Rosetta DSL.

There is a newer version: 11.27.1

package com.regnosys.rosetta.common.util;

/*-
 * ==============
 * Rune Common
 * ==============
 * Copyright (C) 2018 - 2024 REGnosys
 * ==============
 * 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.
 * ==============
 */

import static java.lang.Character.toLowerCase;
import static java.lang.Character.toUpperCase;

public class StringExtensions {

    public static String toFirstLower(String s) {
        return s != null ? toLowerCase(s.charAt(0)) + s.substring(1) : "";
    }

    public static String toFirstUpper(String s) {
        return s != null ? toUpperCase(s.charAt(0)) + s.substring(1) : "";
    }
}