Java String Capitalize capitalize(String s)

Description

Ensures that a string starts with a capitalized letter.

License

Apache License

Parameter

Parameter	Description
s	accepts a string, null, empty

Declaration

public static String capitalize(String s) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2014 Miami-Dade County/*ww w.  j  av  a 2  s  .  c o m*/
 * 
 * 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 {
    /**
     * Ensures that a string starts with a capitalized letter.
     * @param s accepts a string, null, empty
     * @return
     */
    public static String capitalize(String s) {
        if (s == null || s.isEmpty())
            return s;
        char first = s.charAt(0);
        if (Character.isLetter(first) && Character.isLowerCase(first))
            return Character.toUpperCase(first) + s.substring(1);
        else
            return s;
    }
}

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