Java Utililty Methods ByteBuffer Put

buf.mark();
if (buf.hasArray()) {
    out.write(buf.array(), buf.arrayOffset() + buf.position(), buf.remaining());
} else {
    byte[] temp = new byte[Math.min(buf.remaining(), 8192)];
    while (buf.hasRemaining()) {
        int w = Math.min(temp.length, buf.remaining());
        buf.get(temp, 0, w);
...

byte[] buf = new byte[BUFFER_SIZE];
for (;;) {
    int rem = data.remaining();
    if (rem == 0)
        break;
    if (rem > buf.length)
        rem = buf.length;
    data.get(buf, 0, rem);
...

assertArrayIndex(str.length(), offset, count);
CharBuffer chars = CharBuffer.wrap(str, offset, count + offset);
convert(lock, encoder, bytes, chars, out);

assert value >= 0; 
int position = output.position();
while (value > 127) {
    output.put((byte) ((value & 127) + ((value > 127 ? 1 : 0) << 7)));
    value >>= 7;
output.put((byte) (value & 127));
return position;
...

int length = name.remaining();
assert 0 <= length && length <= MAX_UNSIGNED_SHORT;
try {
    out.writeByte((length >> 8) & 0xFF);
    out.writeByte(length & 0xFF);
    out.write(name.array(), name.position() + name.arrayOffset(), name.remaining());
} catch (IOException e) {
    throw new RuntimeException(e);
...

if (buffer.hasArray())
    out.write(buffer.array(), buffer.arrayOffset() + buffer.position(), buffer.remaining());
else {
    byte[] bytes = new byte[TEMP_BUFFER_SIZE];
    while (buffer.hasRemaining()) {
        int byteCountToWrite = Math.min(buffer.remaining(), TEMP_BUFFER_SIZE);
        buffer.get(bytes, 0, byteCountToWrite);
        out.write(bytes, 0, byteCountToWrite);
...

while ((input & -128) != 0) {
    buffer.put((byte) (input & 127 | 128));
    input >>>= 7;
buffer.put((byte) input);