Java BigInteger Calculate getRandomInteger(BigInteger n, Random rand)

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Description

Return a uniformly chosen integer between 0 and n-1.

License

Open Source License

Declaration 

public static BigInteger getRandomInteger(BigInteger n, Random rand)

Method Source Code


//package com.java2s;
//License from project: Open Source License 

import java.math.BigInteger;
import java.util.Random;

public class Main {
    /**/* ww w .j  a va  2  s  .c o m*/
     * Return a uniformly chosen integer between 0 and n-1.
     */
    public static BigInteger getRandomInteger(BigInteger n, Random rand) {
        BigInteger r;
        int maxbits = n.bitLength();
        do {
            r = new BigInteger(maxbits, rand);
        } while (r.compareTo(n) >= 0);
        return r;
    }
}

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