Closes the stream and releases any system resources associated with it.

  Closes the stream and releases any system resources associated with
it. Once the stream has been closed, further read(),
ready(), mark(), or reset() invocations will throw an IOException.
Closing a previously closed stream has no effect.

  Marks the present position in the stream.

  Marks the present position in the stream. Subsequent calls to reset()
will reposition the stream to this point.
Parameters:
- readAheadLimit - Limit on the number of characters that may be read while still preserving the mark. Because the stream's input comes from a string, there is no actual limit, so this argument must not be negative, but is otherwise ignored.
Throws:
- IllegalArgumentException - If readAheadLimit is < 0
- IOException - If an I/O error occurs

Tells whether this stream supports the mark() operation, which it does.

  Reads a single character.

  Reads a single character.
Returns: The character read, or -1 if the end of the stream has been reached
Throws:
- IOException - If an I/O error occurs

  Reads characters into a portion of an array.

  Reads characters into a portion of an array.
Returns: The number of characters read, or -1 if the end of the stream has been reached
Parameters:
- cbuf - Destination buffer
- off - Offset at which to start writing characters
- len - Maximum number of characters to read
Throws:
- IOException - If an I/O error occurs

  Tells whether this stream is ready to be read.

  Tells whether this stream is ready to be read.
Returns: True if the next read() is guaranteed not to block for input
Throws:
- IOException - If the stream is closed

  Resets the stream to the most recent mark, or to the beginning of the string if it has never been marked.

  Resets the stream to the most recent mark, or to the beginning of the
string if it has never been marked.
Throws:
- IOException - If an I/O error occurs

  Skips the specified number of characters in the stream.

  Skips the specified number of characters in the stream. Returns the number of characters that were skipped.

The ns parameter may be negative, even though the skip method of the Reader superclass throws an exception in this case. Negative values of ns cause the stream to skip backwards. Negative return values indicate a skip backwards. It is not possible to skip backwards past the beginning of the string.

If the entire string has been read or skipped, then this method has no effect and always returns 0.
Throws:
- IOException - If an I/O error occurs