Java - Write code to Return the provided text with its first letter in upper or lower case, depending on what is provided for the "upper" parameter.

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Requirements

Write code to Return the provided text with its first letter in upper or lower case, depending on what is provided for the "upper" parameter.

Demo

//package com.book2s;

public class Main {
    public static void main(String[] argv) {
        String text = "book2s.com";
        boolean upper = true;
        System.out.println(firstLetterToCase(text, upper));
    }//  w ww  . j a  va  2s  . c o  m

    /**
     * Returns the provided text with its first letter in upper or lower case,
     * depending on what is provided for the "upper" parameter.
     * @param   text   A string value
     * @param   upper   Whether the first letter should be upper or lower case
     * @return   The text with its first letter in upper or lower case
     */
    public static String firstLetterToCase(String text, boolean upper) {
        char[] stringArray = text.toCharArray();

        if (text.length() >= 1) {
            if (upper) {
                stringArray[0] = Character.toUpperCase(stringArray[0]);
            } else {
                stringArray[0] = Character.toLowerCase(stringArray[0]);
            }
        }

        return new String(stringArray);
    }
}

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