Java Utililty Methods ByteBuffer Set

List of utility methods to do ByteBuffer Set

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Description

The list of methods to do ByteBuffer Set are organized into topic(s).

Method

voidmemset(ByteBuffer dstBuffer, int dstByteOffset, byte value, int length)
memset 
for (int ii = dstByteOffset; ii < dstByteOffset + length; ++ii) {
    dstBuffer.put(ii, value);
StringparseContent(ByteBuffer buffer, int offset, int length)
parse Content 
byte[] chunk = new byte[length];
char[] start = new char[length];
try {
    buffer.get(chunk, offset, length);
    return new String(chunk, StandardCharsets.ISO_8859_1);
} finally {
    buffer.rewind();
ByteBufferparseToByteBuffer(Object value)
parse To Byte Buffer 
if (value == null) {
    return null;
if (value instanceof ByteBuffer) {
    return (ByteBuffer) value;
} else {
    return ByteBuffer.wrap(value.toString().getBytes());
intpourBufferToArray(ByteBuffer source, byte[] destination, int offset, int sizeRequested)
Assumes source is ready to be read. 
int numberToRead = Math.min(source.remaining(), sizeRequested);
source.get(destination, offset, numberToRead);
return numberToRead;
BitSetreadBitset(ByteBuffer bb, int numbytes)
Reads a series of bytes from the given buffer, turning them into a little-endian bit-set. 
byte[] barr = new byte[numbytes];
bb.get(barr);
BitSet ret = new BitSet(numbytes * 8);
for (int i_byte = 0; i_byte < barr.length; i_byte++) {
    for (int i = 0; i < 8; i++) {
        int idx = i_byte * 8 + i;
        boolean isSet = (barr[i_byte] & (1 << i)) > 0;
        ret.set(idx, isSet);
...
BitSetreadBitSet(ByteBuffer buf, int len)
read Bit Set 
BitSet bs = new BitSet((len + 7) >>> 3);
int i;
int b = 0;
int leftBit = 0x01;
int bitMask = 0;
for (i = 0; i < len; i++) {
    if (i % 8 == 0) {
        b = buf.get();
...
intreadBlock(ByteBuffer buffer, String fileName, long startOffset, Logger log)
Read one block from data file. 
File file = new File(fileName);
if (!file.exists()) {
    if (log != null)
        log.log(Level.WARNING, "Cannot read file {0}, that does not exist", fileName);
    return 0;
if (startOffset + buffer.remaining() > file.length()) {
    int length = (int) (file.length() - startOffset);
...
voidreadFromChannel(FileChannel fc, ByteBuffer buffer, int bufferOffset, int num)
read From Channel 
buffer.position(bufferOffset);
if (buffer.remaining() < num) {
    throw new BufferUnderflowException();
buffer.limit(bufferOffset + num);
int numRead = 0;
int t = 0;
while (numRead < num) {
...
byte[]readKey(ByteBuffer index, int indexByteOffset, byte[] foundKey)
read Key 
index.position(indexByteOffset);
index.get(foundKey);
return foundKey;
StringreadPackageName(ByteBuffer buffer, int offset)
Reads the package name from the buffer and repositions the buffer to point directly after the package name. 
Charset utf16 = Charset.forName("UTF-16LE");
String str = new String(buffer.array(), offset, PACKAGE_NAME_SIZE, utf16);
buffer.position(offset + PACKAGE_NAME_SIZE);
return str;