Java Utililty Methods ByteBuffer Get

List of utility methods to do ByteBuffer Get

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Description

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

Method

intcalculateNewLength(ByteBuffer source, ByteBuffer target)
calculate New Length 
long newLength = source.capacity() + (target.limit() - source.remaining());
if (newLength <= threshold) {
    return (int) newLength;
return -1;
byte[]get(ByteBuffer buffer)
get 
byte[] data = new byte[buffer.limit()];
buffer.get(data);
return data;
byte[]get(ByteBuffer source)
get 
if (source.hasArray()) {
    return source.array();
} else {
    source.rewind();
    System.out.println(source.limit());
    byte[] array = new byte[source.limit()];
    for (int i = 0; i < array.length; i++) {
        array[i] = source.get();
...
intget3ByteInt(ByteBuffer buffer)
Read a 3 byte int from a buffer 
return get3ByteInt(buffer, buffer.order());
byte[]getActiveArray(ByteBuffer buffer)
get Active Array 
byte[] ret = new byte[buffer.remaining()];
if (buffer.hasArray()) {
    byte[] array = buffer.array();
    System.arraycopy(array, buffer.arrayOffset() + buffer.position(), ret, 0, ret.length);
} else {
    buffer.slice().get(ret);
return ret;
...
longgetAddress(ByteBuffer buf)
get Address 
try {
    long address;
    address = ADDRESS_FIELD.getLong(buf);
    return address;
} catch (Exception x) {
    throw new RuntimeException(x);
longgetAddress(ByteBuffer buffer)
get Address 
Preconditions.checkArgument(buffer.isDirect(), "ByteBuffer must be DirectBuffer");
return ((DirectBuffer) buffer).address();
longgetAddress(ByteBuffer buffer)
get Address 
return ((sun.nio.ch.DirectBuffer) buffer).address();
longgetAddressFromDirectByteBuffer(ByteBuffer buffer)
Gets the address value for the memory that backs a direct byte buffer. 
try {
    Field addressField = Buffer.class.getDeclaredField("address");
    addressField.setAccessible(true);
    return addressField.getLong(buffer);
} catch (Exception e) {
    throw new RuntimeException("Unable to address field from ByteBuffer", e);
byte[]getArray(ByteBuffer buffer)
You should almost never use this. 
int length = buffer.remaining();
if (buffer.hasArray()) {
    int boff = buffer.arrayOffset() + buffer.position();
    if (boff == 0 && length == buffer.array().length)
        return buffer.array();
    else
        return Arrays.copyOfRange(buffer.array(), boff, boff + length);
byte[] bytes = new byte[length];
buffer.duplicate().get(bytes);
return bytes;