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| java.lang.Object
 java.io.Reader
java.io.BufferedReader
java.io.LineNumberReader
| LineNumberReader | | public class LineNumberReader extends BufferedReader (Code) | | A buffered character-input stream that keeps track of line numbers. This
class defines methods
LineNumberReader.setLineNumber(int) and
LineNumberReader.getLineNumber() for setting and getting the current line number
respectively.
By default, line numbering begins at 0. This number increments at every
line terminator as the data is read, and can be changed
with a call to setLineNumber(int). Note however, that
setLineNumber(int) does not actually change the current position in
the stream; it only changes the value that will be returned by
getLineNumber().
A line is considered to be terminated by any one of a
line feed ('\n'), a carriage return ('\r'), or a carriage return followed
immediately by a linefeed.
version:
1.29, 07/05/05
author:
Mark Reinhold
since:
JDK1.1 |
| Constructor Summary | |
| public | LineNumberReader(Reader in)
Create a new line-numbering reader, using the default input-buffer
size. | | public | LineNumberReader(Reader in, int sz)
Create a new line-numbering reader, reading characters into a buffer of
the given size. |
| Method Summary | |
| public int | getLineNumber()
Get the current line number. | | public void | mark(int readAheadLimit)
Mark the present position in the stream. | | public int | read()
Read a single character. | | public int | read(char cbuf, int off, int len)
Read characters into a portion of an array. | | public String | readLine()
Read a line of text. | | public void | reset()
Reset the stream to the most recent mark. | | public void | setLineNumber(int lineNumber)
Set the current line number. | | public long | skip(long n)
Skip characters. |
| LineNumberReader | | public LineNumberReader(Reader in)(Code) | | Create a new line-numbering reader, using the default input-buffer
size.
Parameters:
in - A Reader object to provide the underlying stream |
| LineNumberReader | | public LineNumberReader(Reader in, int sz)(Code) | | Create a new line-numbering reader, reading characters into a buffer of
the given size.
Parameters:
in - A Reader object to provide the underlying stream
Parameters:
sz - An int specifying the size of the buffer |
| mark | | public void mark(int readAheadLimit) throws IOException(Code) | | Mark the present position in the stream. Subsequent calls to reset()
will attempt to reposition the stream to this point, and will also reset
the line number appropriately.
Parameters:
readAheadLimit - Limit on the number of characters that may be read while stillpreserving the mark. After reading this many characters,attempting to reset the stream may fail.
throws:
IOException - If an I/O error occurs |
| read | | public int read() throws IOException(Code) | | Read a single character. Line terminators are
compressed into single newline ('\n') characters. Whenever a line
terminator is read the current line number is incremented.
The character read, or -1 if the end of the stream has beenreached
throws:
IOException - If an I/O error occurs |
| read | | public int read(char cbuf, int off, int len) throws IOException(Code) | | Read characters into a portion of an array. Whenever a line terminator is read the current line number is
incremented.
Parameters:
cbuf - Destination buffer
Parameters:
off - Offset at which to start storing characters
Parameters:
len - Maximum number of characters to read The number of bytes read, or -1 if the end of the stream hasalready been reached
throws:
IOException - If an I/O error occurs |
| reset | | public void reset() throws IOException(Code) | | Reset the stream to the most recent mark.
throws:
IOException - If the stream has not been marked, or if the mark has beeninvalidated |
| setLineNumber | | public void setLineNumber(int lineNumber)(Code) | | Set the current line number.
Parameters:
lineNumber - An int specifying the line number
See Also: LineNumberReader.getLineNumber |
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