Java in a Nutshell, 5th Edition [Electronic resources]

This class is a character input stream that keeps track of the number of lines of text that have been read from it. It supports the usual Reader methods and also the readLine( ) method introduced by its superclass. In addition to these methods, you can call getLineNumber( ) to query the number of lines set so far. You can also call setLineNumber( ) to set the line number for the current line. Subsequent lines are numbered sequentially from this specified starting point. This class is a character-stream analog to LineNumberInputStream, which has been deprecated as of Java 1.1.

public class 
LineNumberReader  extends BufferedReader {
// Public Constructors
public 
LineNumberReader (Reader 
in );  
public 
LineNumberReader (Reader 
in , int 
sz );  
// Public Instance Methods
public int 
getLineNumber ( );  
public void 
setLineNumber (int 
lineNumber );  
// Public Methods Overriding BufferedReader
public void 
mark (int 
readAheadLimit ) throws IOException;  
public int 
read ( ) throws IOException;  
public int 
read (char[ ] 
cbuf , int 
off , int 
len ) throws IOException;  
public String 
readLine ( ) throws IOException;  
public void 
reset ( ) throws IOException;  
public long 
skip (long 
n ) throws IOException;  
}