The character read, as an integer in the range
0 to 65535 (0x00-0xffff), or -1 if the
end of the stream has been reached
IOException If an I/O error occurs
Reads characters into a portion of an array.
This method implements the general contract of the corresponding Reader#read(char[], int, int) read method of the Reader class. As an additional convenience, it attempts to read as many characters as possible by repeatedly invoking the read method of the underlying stream. This iterated read continues until one of the following conditions becomes true:
The specified number of characters have been read,
The read method of the underlying stream returns -1, indicating end-of-file, or
The ready method of the underlying stream returns false, indicating that further input requests would block.
If the first read on the underlying stream returns -1 to indicate end-of-file then this method returns -1. Otherwise this method returns the number of characters actually read.
Subclasses of this class are encouraged, but not required, to attempt to read as many characters as possible in the same fashion.
Ordinarily this method takes characters from this stream's character buffer, filling it from the underlying stream as necessary. If, however, the buffer is empty, the mark is not valid, and the requested length is at least as large as the buffer, then this method will read characters directly from the underlying stream into the given array. Thus redundant BufferedReaders will not copy data unnecessarily.
Destination buffer
Offset at which to start storing characters
Maximum number of characters to read
The number of characters read, or -1 if the end of the stream has been reached
IOException If an I/O error occurs
IndexOutOfBoundsException {@inheritDoc }
Reads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), a carriage return followed immediately by a line feed, or by reaching the end-of-file (EOF).
A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached without reading any characters
IOException If an I/O error occurs
java.nio.file.Files#readAllLines
Reads a single character.