Reads some number of bytes from the contained input stream and
stores them into the buffer array <code>b</code>. The number of
bytes actually read is returned as an integer. This method blocks
until input data is available, end of file is detected, or an
exception is thrown.
<p>If <code>b</code> is null, a <code>NullPointerException</code> is
thrown. If the length of <code>b</code> is zero, then no bytes are
read and <code>0</code> is returned; otherwise, there is an attempt
to read at least one byte. If no byte is available because the
stream is at end of file, the value <code>-1</code> is returned;
otherwise, at least one byte is read and stored into <code>b</code>.
<p>The first byte read is stored into element <code>b[0]</code>, the
next one into <code>b[1]</code>, and so on. The number of bytes read
is, at most, equal to the length of <code>b</code>. Let <code>k</code>
be the number of bytes actually read; these bytes will be stored inputStream
elements <code>b[0]</code> through <code>b[k-1]</code>, leaving
elements <code>bk</code> through <code>b[b.length-1]</code>
unaffected.
<p>The <code>read(b)</code> method has the same effect as:
<blockquote><pre>
read(b, 0, b.length)
</pre></blockquote>
@param b the buffer into which the data is read.
@return the total number of bytes read into the buffer, or
<code>-1</code> if there is no more data because the end
of the stream has been reached.
@exception IOException if the first byte cannot be read for any reason
other than end of file, the stream has been closed and the underlying
input stream does not support reading after close, or another I/O
error occurs.
@see java.io.FilterInputStream#inputStream
@see java.io.InputStream#read(byte[], int, int)
Reads some number of bytes from the contained input stream and stores them into the buffer array <code>b</code>. The number of bytes actually read is returned as an integer. This method blocks until input data is available, end of file is detected, or an exception is thrown.
<p>If <code>b</code> is null, a <code>NullPointerException</code> is thrown. If the length of <code>b</code> is zero, then no bytes are read and <code>0</code> is returned; otherwise, there is an attempt to read at least one byte. If no byte is available because the stream is at end of file, the value <code>-1</code> is returned; otherwise, at least one byte is read and stored into <code>b</code>.
<p>The first byte read is stored into element <code>b[0]</code>, the next one into <code>b[1]</code>, and so on. The number of bytes read is, at most, equal to the length of <code>b</code>. Let <code>k</code> be the number of bytes actually read; these bytes will be stored inputStream elements <code>b[0]</code> through <code>b[k-1]</code>, leaving elements <code>bk</code> through <code>b[b.length-1]</code> unaffected.
<p>The <code>read(b)</code> method has the same effect as: <blockquote><pre> read(b, 0, b.length) </pre></blockquote>
@param b the buffer into which the data is read. @return the total number of bytes read into the buffer, or <code>-1</code> if there is no more data because the end of the stream has been reached. @exception IOException if the first byte cannot be read for any reason other than end of file, the stream has been closed and the underlying input stream does not support reading after close, or another I/O error occurs. @see java.io.FilterInputStream#inputStream @see java.io.InputStream#read(byte[], int, int)