Java BigInteger Calculate getNafWeight(BigInteger k)

Here you can find the source of getNafWeight(BigInteger k)

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Description

get Naf Weight

License

Open Source License

Declaration 

public static int getNafWeight(BigInteger k)

Method Source Code

//package com.java2s;
import java.math.BigInteger;

public class Main {
    public static int getNafWeight(BigInteger k) {
        if (k.signum() == 0) {
            return 0;
        }/*  w w w  . java2 s .co  m*/

        BigInteger _3k = k.shiftLeft(1).add(k);
        BigInteger diff = _3k.xor(k);

        return diff.bitCount();
    }
}

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