Java Random randomSign()

Description

Used to get a random -1 or 1 to create numbers with random sign.

License

Open Source License

Return

a random -1 or 1

Declaration

public static int randomSign() 

Method Source Code

//package com.java2s;
/* Copyright (C) 2006-2010  Joan Queralt Molina
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *///from  w ww.  j  a v a 2  s  . c  o m

import java.util.*;

public class Main {
    /**
     * Used through all program to calculate random numbers
     */
    public static Random random = new Random();

    /**
     * Used to get a random -1 or 1 to create numbers with random sign. 
     * 
     * @return  a random -1 or 1
     */
    public static int randomSign() {
        return (random.nextInt(2) << 1) - 1;
    }
}

Related

1. randomPseudo()
2. randomRange(int end)
3. randomScalingFactor()
4. randomSeed()
5. randomShort()
6. randomSimpleId()
7. randomSleep()
8. randomStateAbbr()
9. randomStr(Random rnd, int size)