The index one greater than the index of the last valid byte in
the buffer.
This value is always
in the range <code>0</code> through <code>buf.length</code>;
elements <code>buf[0]</code> through <code>buf[count-1]
</code>contain buffered input data obtained
from the underlying input stream.
The index one greater than the index of the last valid byte in the buffer. This value is always in the range <code>0</code> through <code>buf.length</code>; elements <code>buf[0]</code> through <code>buf[count-1] </code>contain buffered input data obtained from the underlying input stream.