convert Unsigned Short to BigInteger - Java java.math

Java examples for java.math:BigInteger

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Description

convert Unsigned Short to BigInteger

Demo Code

/**//from  w w  w. j av a2 s . co m
 *     Copyright (c) 2013, Will Szumski
 *
 *     This file is part of formicidae.
 *
 *     formicidae 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.
 *
 *     formicidae 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 formicidae.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.math.BigInteger;
import java.nio.ByteBuffer;

public class Main {
    public static int NUMBER_OF_BYTES_SHORT = Short.SIZE / Byte.SIZE;

    public static BigInteger convertUnsignedShort(short value) {
        if (value >= 0) {
            return convertShort(value);
        }
        return new BigInteger(ByteBuffer
                .allocate(NUMBER_OF_BYTES_SHORT + 1).putShort(1, value)
                .array());
    }

    public static BigInteger convertShort(short value) {
        return new BigInteger(ByteBuffer.allocate(NUMBER_OF_BYTES_SHORT)
                .putShort(value).array());
    }
}

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