New Input/Output - Beginning Java 8 Language Features - page 401

public int getByteData(ByteBuffer buffer) {
if (!bBuffer.hasRemaining()) {
return -1;
}
int count = 0;
while (bBuffer.hasRemaining() && buffer.hasRemaining()) {
buffer.put(bBuffer.get());
count++;
}
return count;
}
public int getCharData(CharBuffer buffer) {
if (!cBuffer.hasRemaining()) {
return -1;
}
int count = 0;
while (cBuffer.hasRemaining() && buffer.hasRemaining()) {
buffer.put(cBuffer.get());
count++;
}
return count;
}
public void storeByteData(ByteBuffer byteData) {
if (this.bBuffer == null) {
int total = byteData.remaining();
this.bBuffer = ByteBuffer.allocate(total);
while (byteData.hasRemaining()) {
this.bBuffer.put(byteData.get());
}
this.bBuffer.flip();
}
else {
this.bBuffer = this.appendContent(byteData);
}
}
private ByteBuffer appendContent(ByteBuffer content) {
// Create a new buffer to accommodate new data
int count = bBuffer.limit() + content.remaining();
ByteBuffer newBuffer = ByteBuffer.allocate(count);
// Set the position of bBuffer that has some data
bBuffer.clear();
newBuffer.put(bBuffer);
newBuffer.put(content);