Java BigInteger Calculate decodeBitListFromBigInteger(BigInteger bits)

Description

decode Bit List From Big Integer

License

Apache License

Declaration

public static int[] decodeBitListFromBigInteger(BigInteger bits) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.math.BigInteger;

import java.util.ArrayList;

import java.util.List;

public class Main {
    public static int[] decodeBitListFromBigInteger(BigInteger bits) {
        List<Integer> resultList = new ArrayList<Integer>();
        BigInteger mask = BigInteger.ONE;
        int valueCandidate = 1;
        while (mask.compareTo(bits) <= 0) {
            if ((mask.and(bits)).equals(mask)) {
                resultList.add(Integer.valueOf(valueCandidate));
            }//www  . ja va2 s.co m
            valueCandidate++;
            mask = mask.shiftLeft(1);
        }

        int[] result = new int[resultList.size()];
        for (int i = 0; i < result.length; i++) {
            result[i] = resultList.get(i).intValue();
        }
        return result;
    }
}

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