Java Scanner Usage confirm(String message)

Description

confirm

License

Open Source License

Parameter

Parameter	Description
message	to display

Return

true if user enters y

Declaration

public static boolean confirm(String message) 

Method Source Code

//package com.java2s;
/*/*w  w  w  .jav a2 s  . com*/
 * Scaffold Hunter
 * Copyright (C) 2006-2008 PG504
 * Copyright (C) 2010-2011 PG552
 * Copyright (C) 2012-2014 LS11
 * See the file README.txt in the root directory of the Scaffold Hunter
 * source tree for details.
 *
 * Scaffold Hunter is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Scaffold Hunter is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.Scanner;

public class Main {
    private static Scanner scanner = new Scanner(System.in);
    private static final String NEW_LINE = "\n";

    /**
     * @param message
     *            to display
     * @return true if user enters y
     */
    public static boolean confirm(String message) {
        out(NEW_LINE, message + " (Y/N): ");

        String response = scanner.nextLine();
        return response != null && response.trim().toUpperCase().equals("Y");
    }

    /**
     * @param message
     *            to display
     * @param defaultValue
     *            defaultValue
     * @return true if user enters y, false if user enter n and all other cases
     *         it returns defaultValue
     */
    public static boolean confirm(String message, boolean defaultValue) {
        out(NEW_LINE, message + (defaultValue ? " [Y] " : " [N] ") + "(Y/N): ");
        String response = scanner.nextLine();
        return response == null ? defaultValue
                : response.trim().toUpperCase().equals("Y") ? true
                        : response.trim().equalsIgnoreCase("N") ? false : defaultValue;
    }

    /**
     * Display all message to console
     * 
     * @param messages
     */
    public static void out(String... messages) {
        for (String message : messages) {
            System.out.print(message);
        }
    }
}

Related

1. calcCompileWarnings(String compilerResult)
2. cleanUpEmptyLinesAndIndent(String input)
3. close()
4. common(Scanner in)
5. computeSumTable(Scanner in, short n)
6. confirm(String message)
7. confirmAction(String warning)
8. countFileLines(Scanner fin)
9. createKeyboardScanner()