Java Scanner Usage isYes(String str)

Description

is Yes

License

Open Source License

Declaration

public static boolean isYes(String str) 

Method Source Code

//package com.java2s;
/*************************************************************************
 *
 *  The Contents of this file are made available subject to the terms of
 *  the Sun Industry Standards Source License Version 1.2
 *
 *  Sun Microsystems Inc., March, 2001//w w w. j a  v a  2  s .  c  o  m
 *
 *
 *  Sun Industry Standards Source License Version 1.2
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.2 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
 *  License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *   The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *   Copyright: 2001 by Sun Microsystems, Inc.
 *
 *   All Rights Reserved.
 *
 ************************************************************************/

import java.util.InputMismatchException;

import java.util.Scanner;

public class Main {
    public static final String PATTERN_YES_NO = "y(es)?|no?";

    public static boolean isYes(String str) {
        return getYesNoAsInt(str) == 1 ? true : false;
    }

    public static int getYesNoAsInt(String str) {
        str = str.toLowerCase();
        if (!isValueValid(str, PATTERN_YES_NO)) {
            throw new IllegalArgumentException(str + " is not a yes_no type");
        }
        if (str.startsWith("y")) {
            return 1;
        } else if (str.startsWith("n")) {
            return 0;
        } else {
            throw new IllegalArgumentException("YesNoAsInt coversion error for input: " + str);
        }
    }

    private static boolean isValueValid(String value, String pattern) {
        Scanner s = new Scanner(value);
        try {
            s.next("^(" + pattern + ")$");
            return true;
        } catch (InputMismatchException ex) {
            return false;
        }
    }
}

Related

1. input(String message)
2. input(String prompt)
3. isInteger(String s)
4. isNumeric(String str)
5. isValueValid(String value, String pattern)
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7. joinSqlStatements(Collection scripts)
8. leerOpcion(String opciones, String msgUsr, String msgErr)
9. leerTexto(String msgUsr)