Java Utililty Methods ByteBuffer from Byte Array

List of utility methods to do ByteBuffer from Byte Array

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Description

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

Method

ByteBufferasByteBuffer(byte... arguments)
as Byte Buffer 
return ByteBuffer.wrap(arguments);
byte[]buffer2Bytes(ByteBuffer bbuf)
buffer Bytes 
byte[] b = new byte[bbuf.remaining()];
int pos = bbuf.position();
bbuf.get(b);
bbuf.position(pos); 
return b;
byte[]bufToArray(ByteBuffer b)
buf To Array 
if (b == null) {
    return null;
} else if (b.hasArray()) {
    if (b.position() == 0 && b.arrayOffset() == 0 && b.limit() == b.capacity()) {
        return b.array();
    } else {
        return Arrays.copyOfRange(b.array(), b.arrayOffset(), b.arrayOffset() + b.remaining());
} else {
    byte[] a = new byte[b.remaining()];
    if (b.remaining() > 0) {
        int bp = b.position();
        b.get(a);
        b.position(bp);
    return a;
byte[]bufToArray(ByteBuffer b)
Converts ByteBuffer to an array - if the buffer is backed by the array but doesn't fully overlap it it performs an array copy. 
if (b.hasArray()) {
    if (b.position() == 0 && b.arrayOffset() == 0 && b.limit() == b.capacity()) {
        return b.array();
    } else {
        return Arrays.copyOfRange(b.array(), b.arrayOffset(), b.arrayOffset() + b.remaining());
} else {
    byte[] a = new byte[b.remaining()];
...
ByteBufferbyteBuffer(byte[] a)
Converts an byte array into a direct ByteBuffer. 
ByteBuffer buf = directByteBuffer(a.length);
buf.put(a);
buf.rewind();
return buf;
byte[]readByteArray(ByteBuffer byteBuffer, int length)
read Byte Array 
byte[] ret = new byte[length];
byteBuffer.get(ret, 0, length);
return ret;
byte[]readByteArray(ByteBuffer in)
read Byte Array 
int len = readVInt(in);
if (len < 0)
    return null;
byte[] array = new byte[len];
in.get(array);
return array;
byte[]readByteArray(ByteBuffer logBuf)
Read a byte array from the log. 
int size = readInt(logBuf); 
if (DEBUG) {
    System.out.println("pos = " + logBuf.position() + " byteArray is " + size + " on read");
if (size == 0) {
    return ZERO_LENGTH_BYTE_ARRAY;
byte[] b = new byte[size];
...
intreadByteAsInt(ByteBuffer buffer)
read Byte As Int 
return Byte.toUnsignedInt(buffer.get());
ByteBufferreadBytes(ByteBuffer bb, int length)
Read length bytes from bb into a new ByteBuffer. 
ByteBuffer copy = bb.duplicate();
copy.limit(copy.position() + length);
bb.position(bb.position() + length);
return copy;