LineNumberReader class

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

Constructor	Summary

int getLineNumber() Get the current line number. void mark(int readAheadLimit) Mark the present position in the stream. int read() Read a single character. The character read, or -1 if the end of the stream has been reached int read(char[] cbuf, int off, int len) Read characters into a portion of an array. The character read, or -1 if the end of the stream has been reached String readLine() Read a line of text. void reset() Reset the stream to the most recent mark. void setLineNumber(int lineNumber) Set the current line number. long skip(long n) Skip characters.

Return	Return	Method Summary

import java.io.FileReader;
import java.io.LineNumberReader;

public class Main {
  public static void main(String[] args) throws Exception {
    LineNumberReader lnr = null;

    FileReader fr = new FileReader("c:/a.htm");
    lnr = new LineNumberReader(fr);

    String s;
    while ((s = lnr.readLine()) != null)
      System.out.println(lnr.getLineNumber() + ": " + s);
  }
}