Java Utililty Methods BitSet Create

BitSet bitSet(byte[] bytes)
Create a BitSet instance,start index is 0

example:

 byte: 50 binary: 0b110010 +--------+---+---+---+---+---+---+---+---+ | bits | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | +--------+---+---+---+---+---+---+---+---+ | bitset | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | +--------+---+---+---+---+---+---+-------+ bitSet.toString(): {2, 3, 6} 

if (bytes == null) {
 return null;
BitSet bit = new BitSet();
int index = 0;
for (byte aByte : bytes) {
 for (int j = 7; j >= 0; j--) {
 bit.set(index++, (aByte & (1 << j)) >>> j == 1);
...

BitSet bitSet(byte[] bytes)
Create a BitSet instance,start index is 0.

if (bytes == null) {
 throw new IllegalArgumentException("bitMap must not be null");
BitSet bit = new BitSet();
int index = 0;
for (int i = 0; i < bytes.length; i++) {
 for (int j = 7; j >= 0; j--) {
 bit.set(index++, (bytes[i] & (1 << j)) >>> j == 1);
...

BitSet bitSet(String string)
bit Set

BitSet result = new BitSet();
for (int i = string.length(); --i >= 0;)
 result.set(string.charAt(i));
return result;

BitSet bitSetFrom(long number)
Creates a BitSet representation of a given long

return bitSetFrom(number, NBITS_LONG_REPRESENTATION);

BitSet bitsetFromIndices(int size, int... indices)
Constructs a new BitSet of given size whose set bits are specified by indices .

final BitSet bitset = new BitSet(size);
for (int index : indices) {
 if (index < 0 || index >= size) {
 throw new IndexOutOfBoundsException(
 String.format("Index %d out of range [0, %d]", index, size - 1));
 if (bitset.get(index)) {
 throw new IllegalArgumentException(String.format("Duplicate index %d", index));
...

BitSet bitsetFromString(String pixelsString)
bitset From String

BitSet pixels = new BitSet(pixelsString.length());
int index = 0;
for (int i = 0; i < pixelsString.length(); i++) {
 char c = pixelsString.charAt(i);
 if (c == '\n') {
 continue;
 pixels.set(index, c != '0');
...

BitSet bitSetOf(long lowerBits, long upperBits)
bit Set Of

final BitSet bitSet = new BitSet();
convert(lowerBits, 0, bitSet);
convert(upperBits, Long.SIZE, bitSet);
return bitSet;

BitSet bitSetOf(String inString)
bit Set Of

BitSet bitSet = new BitSet();
int i = 0;
for (byte b : inString.getBytes()) {
 if (b == '1') {
 bitSet.set(i);
 i += 1;
return bitSet;

BitSet bitSetOfIndexes(int... indexes)
bit Set Of Indexes

BitSet bitSet = new BitSet();
for (int index : indexes) {
 bitSet.set(index);
return bitSet;

BitSet Byte2BitSet(byte bytes)
Byte Bit Set

BitSet bits = new BitSet(8);
for (int i = 0; i < 8; i++) {
 if ((bytes & (1 << i)) > 0) {
 bits.set(i);
return bits;