Java Utililty Methods ByteBuffer to Byte Array

List of utility methods to do ByteBuffer to Byte Array

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Description

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

Method

byte[]convertVarIntByteBufferToByteArray(ByteBuffer byteBuffer)
Converts a variable length integer (https://en.bitcoin.it/wiki/Protocol_documentation#Variable_length_integer) from a ByteBuffer to byte array 
byte originalVarIntSize = byteBuffer.get();
byte varIntSize = getVarIntSize(originalVarIntSize);
byte[] varInt = new byte[varIntSize];
varInt[0] = originalVarIntSize;
byteBuffer.get(varInt, 1, varIntSize - 1);
return varInt;
byte[]deserializeBytes(ByteBuffer buf)
deserialize Bytes 
int size = buf.getInt();
if (size == 0) {
    return null;
byte[] b = new byte[size];
buf.get(b);
return b;
byte[]getByteArray(ByteBuffer buff)
Create a new byte[] array and populate it with the given ByteBuffer's contents. 
if (buff == null)
    return null;
buff.clear();
byte[] inds = new byte[buff.limit()];
for (int x = 0; x < inds.length; x++) {
    inds[x] = buff.get();
return inds;
...
byte[]getByteArray(ByteBuffer byteBuffer)
get Byte Array 
if (byteBuffer.hasArray()) {
    return copyOfRange(byteBuffer.array(), byteBuffer.position() + byteBuffer.arrayOffset(),
            byteBuffer.limit() + byteBuffer.arrayOffset());
byte[] result = new byte[byteBuffer.limit() - byteBuffer.position()];
byteBuffer.get(result);
return result;
byte[]getByteArray(ByteBuffer byteBuffer)
get Byte Array 
short length = byteBuffer.getShort();
byte[] array = new byte[length];
if (length != 0) {
    byteBuffer.get(array);
return array;
byte[]getByteArray(final ByteBuffer buff)
get Byte Array 
if (buff == null) {
    return null;
buff.clear();
final byte[] inds = new byte[buff.limit()];
for (int x = 0; x < inds.length; x++) {
    inds[x] = buff.get();
return inds;
byte[]getByteArrayFromBuffer(ByteBuffer byteBuf)
get Byte Array From Buffer 
byteBuf.flip();
byte[] row = new byte[byteBuf.limit()];
byteBuf.get(row);
byteBuf.clear();
return row;
byte[]getByteArrayFromByteBuffer(ByteBuffer content)
This will return a byte array that only contains the data from ByteBuffer. 
int contentLength = content.position();
byte[] bytesArray = new byte[contentLength];
content.flip();
content.get(bytesArray, 0, contentLength);
return bytesArray;
byte[]getBytes(ByteBuffer bb)
get Bytes 
if (bb.hasArray() && bb.arrayOffset() == 0 && bb.position() == 0) {
    byte[] b = bb.array();
    if (b.length == bb.limit())
        return b;
byte[] b = new byte[bb.limit() - bb.position()];
bb.duplicate().get(b);
return b;
...
byte[]getBytes(ByteBuffer buf)
Return the data in the buffer. 
if (buf.hasArray() && buf.arrayOffset() == 0 && buf.position() == 0 && buf.limit() == buf.capacity()) {
    return buf.array();
final byte[] a;
    buf = buf.asReadOnlyBuffer();
    final int len = buf.remaining();
    a = new byte[len];
...