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Class java.io.LineNumberReader 

java.lang.Object
   |
   +----java.io.Reader
           |
           +----java.io.BufferedReader
                   |
                   +----java.io.LineNumberReader
public class LineNumberReader
extends BufferedReader
A buffered character-input stream that keeps track of line numbers. 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.

Constructor Index

o LineNumberReader(Reader)
Create a new line-numbering reader, using the default input-buffer size.
o LineNumberReader(Reader, int)
Create a new line-numbering reader, reading characters into a buffer of the given size.

Method Index

o getLineNumber()
Get the current line number.
o mark(int)
Mark the present position in the stream.
o read()
Read a single character.
o read(char[], int, int)
Read characters into a portion of an array.
o readLine()
Read a line of text.
o reset()
Reset the stream to the most recent mark.
o setLineNumber(int)
Set the current line number.
o skip(long)
Skip characters.

Constructors

o LineNumberReader 
 public LineNumberReader(Reader in)
Create a new line-numbering reader, using the default input-buffer size.

o LineNumberReader 
 public LineNumberReader(Reader in,
                         int sz)
Create a new line-numbering reader, reading characters into a buffer of the given size.

Methods

o setLineNumber 
 public void setLineNumber(int lineNumber)
Set the current line number.

o getLineNumber 
 public int getLineNumber()
Get the current line number.

o read 
 public int read() throws IOException
Read a single character. Line terminators are compressed into single newline ('\n') characters.

Returns:
The character read, or -1 if the end of the stream has been reached
Throws: IOException
If an I/O error occurs
Overrides:
read in class BufferedReader
o read 
 public int read(char cbuf[],
                 int off,
                 int len) throws IOException
Read characters into a portion of an array.

Parameters:
cbuf - Destination buffer
off - Offset at which to start storing characters
len - Maximum number of characters to read
Returns:
The number of bytes read, or -1 if the end of the stream has already been reached
Throws: IOException
If an I/O error occurs
Overrides:
read in class BufferedReader
o readLine 
 public String readLine() throws IOException
Read a line of text. 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.

Returns:
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
Throws: IOException
If an I/O error occurs
Overrides:
readLine in class BufferedReader
o skip 
 public long skip(long n) throws IOException
Skip characters.

Parameters:
n - The number of characters to skip
Returns:
The number of characters actually skipped
Throws: IOException
If an I/O error occurs
Overrides:
skip in class BufferedReader
o mark 
 public void mark(int readAheadLimit) throws IOException
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 still preserving the mark. After reading this many characters, attempting to reset the stream may fail.
Throws: IOException
If an I/O error occurs
Overrides:
mark in class BufferedReader
o reset 
 public void reset() throws IOException
Reset the stream to the most recent mark.

Throws: IOException
If the stream has not been marked, or if the mark has been invalidated
Overrides:
reset in class BufferedReader 
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