Java BitSet pickRandomSetIndexFromBitSet(BitSet bitset)

Description

pick Random Set Index From Bit Set

License

Open Source License

Declaration

public static int pickRandomSetIndexFromBitSet(BitSet bitset) 

Method Source Code

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

import java.util.BitSet;

public class Main {
    public static int pickRandomSetIndexFromBitSet(BitSet bitset) {
        if (bitset.isEmpty()) {
            throw new RuntimeException("The bitset is empty, cannot find a set element");
        }/*from   w w  w  .  j ava 2  s. c o  m*/
        // Generate list of set elements in the format that follows: { 2, 4, 5, ...}
        String set = bitset.toString();
        // Separate the elements, and pick one randomly
        String[] indexes = set.substring(1, set.length() - 1).split(",");
        return Integer.parseInt(indexes[(int) (Math.random() * (indexes.length - 1))].trim());
    }
}

Related

1. not(BitSet bitSets)
2. or(BitSet bs1, BitSet bs2)
3. pack(BitSet bitSet)
4. padToByteBoundary(BitSet actualParameter, int sizeInBits, int byteBoundLength, boolean preserveFirstAsSign)
5. parseBitSet(byte[] sfData, int offset, int length)
6. printBitSet(BitSet bs)
7. printBitSet(BitSet iBits, int length)
8. readByte(BitSet bits, int startByte)
9. reverse(final BitSet bitset, final int sizeInBits)