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public abstract boolean willReadBlock()
true
if a call to read
would block
for data.
true
if read would block; otherwise
returns false
.
public abstract int read(byte buffer[], int offset, int length) throws IOException
Reads up to length
bytes from the input stream into
an array of bytes.
If the first argument is null
, up to
length
bytes are read and discarded.
Returns -1 when the end
of the media is reached.
This method only returns 0 if it was called with
a length
of 0.
read
was called with length
0.
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