Convert a BitSet to a binary representation string. - Java java.util

Java examples for java.util:BitSet

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Description

Convert a BitSet to a binary representation string.

Demo Code


//package com.java2s;

import java.util.BitSet;

public class Main {
    /**/*w w  w.java 2s  .c  o  m*/
     * Convert a BitSet to a binary representation string.
     * Each bit is converted into "0" or "1" and added to the string.
     * The result is a binary number with its most significant bit on the left.
     * 
     * @param b BitSet to convert
     * @param startBit Start converting from this bit. Treat it as the least significant bit.
     * @param length Number of bits to read from the BitSet after the startBit.
     * @return String representation of b.
     */
    public static String bitSetToBinaryString(BitSet b, int startBit,
            int length) {
        return bitSetToBinaryString(b, startBit, length, 4);
    }

    /**
     * Convert a BitSet to a binary representation string.
     * Converting each bit into "0" or "1".
     * The result is a binary number with its most significant bit on the left.
     * 
     * @param b BitSet to convert
     * @param startBit Start converting from this bit. Treat it as the least significant bit.
     * @param length Number of bits to read from the BitSet after the startBit.
     * @param wordlength When greater than 0, a space character is added each wordlength number of digits.
     * @return Binary representation String of the BitSet.
     */
    public static String bitSetToBinaryString(BitSet b, int startBit,
            int length, int wordlength) {
        StringBuilder ret = new StringBuilder();

        for (int i = length + startBit - 1; i >= startBit; i--) {
            ret.append(b.get(i) ? "1" : "0");

            if (wordlength != -1 && wordlength > 0 && i > 0
                    && i % wordlength == 0)
                ret.append(' ');
        }

        return ret.toString();
    }
}

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