Java String Capitalize capitalize(final String s)

Description

Capitalizes the first character of the specified string, and de-capitalize the rest of characters.

License

Open Source License

Parameter

Parameter	Description
s	the original word

Return

the capitalized word

Declaration

public static String capitalize(final String s) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2015 LegSem./* w w  w. j  a  v a  2 s. com*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     LegSem - initial API and implementation
 ******************************************************************************/

public class Main {
    /**
     * Capitalizes the first character of the specified string,
     * and de-capitalize the rest of characters.
     * 
     * @param s the original word
     * @return the capitalized word
     */
    public static String capitalize(final String s) {
        if (!isLower(s.charAt(0))) {
            return s;
        }
        StringBuilder sb = new StringBuilder(s.length());
        sb.append(Character.toUpperCase(s.charAt(0)));
        sb.append(s.substring(1).toLowerCase());
        return sb.toString();
    }

    /**
     * Determine if character is lowercase.
     * 
     * @param c the character to test
     * @return true if lower case
     */
    protected static boolean isLower(final char c) {
        return c >= 'a' && c <= 'z' || Character.isLowerCase(c);
    }
}

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