BufferedReader.ready() true at end of stream ?

Is BufferedReader.ready() true, false or undefined, when the end of
the stream is reached (and the next read() would return -1)?

BufferedReader.ready() only return true or false. According to javadoc, it
will return true
if the buffer is not empty or the underlying character stream is ready. So, If
the end of stream is reached, the underlying charatecter stream must not be
ready and depends to the buffer.