Java BigInteger Value Check isPositive(final BigInteger value)

Description

Tests if a given BigInteger value is positive.

License

Open Source License

Parameter

Parameter	Description
value	A potential positive number

Return

true if value is positive, false otherwise

Declaration

public static boolean isPositive(final BigInteger value) 

Method Source Code

//package com.java2s;
/*//from ww w  .  j  a va 2s.co  m
 * UniCrypt
 *
 *  UniCrypt(tm) : Cryptographical framework allowing the implementation of cryptographic protocols e.g. e-voting
 *  Copyright (C) 2014 Bern University of Applied Sciences (BFH), Research Institute for
 *  Security in the Information Society (RISIS), E-Voting Group (EVG)
 *  Quellgasse 21, CH-2501 Biel, Switzerland
 *
 *  Licensed under Dual License consisting of:
 *  1. GNU Affero General Public License (AGPL) v3
 *  and
 *  2. Commercial license
 *
 *
 *  1. This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero General Public License as published by
 *   the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 *   You should have received a copy of the GNU Affero General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 *  2. Licensees holding valid commercial licenses for UniCrypt may use this file in
 *   accordance with the commercial license agreement provided with the
 *   Software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and Bern University of Applied Sciences (BFH), Research Institute for
 *   Security in the Information Society (RISIS), E-Voting Group (EVG)
 *   Quellgasse 21, CH-2501 Biel, Switzerland.
 *
 *
 *   For further information contact <e-mail: unicrypt@bfh.ch>
 *
 *
 * Redistributions of files must retain the above copyright notice.
 */

import java.math.BigInteger;

public class Main {
    /**
     * Tests if a given BigInteger value is positive.
     * <p>
     * @param value A potential positive number
     * @return {@literal true} if {@literal value} is positive, {@literal false} otherwise
     */
    public static boolean isPositive(final BigInteger value) {
        if (value == null) {
            return false;
        }
        return value.signum() == 1;
    }
}

Related

1. isNegative(BigInteger i)
2. isNumberInRange(String text, BigInteger min, BigInteger max)
3. isOdd(BigInteger in)
4. isOdd(BigInteger x)
5. isPerfectCubic(BigInteger n)
6. isPowerOfTwo(BigInteger bintValue)
7. isPowerOfTwo(BigInteger x)
8. isRootInQuadraticResidues(BigInteger n, BigInteger p)
9. isSqrtXXX(BigInteger n, BigInteger root)