How to know a line of text file is ending with line feed or return?

Question

hi all, i have a program that read log file that generated by other service (apache http server for example), i want to know that each line is ending with "\r", "\n" or "\r\n" so i can skip them in the next time, like this:
int char_counter=0;
BufferedReader reader = new BufferedReader(new FileReader(logFileName));
while((line=reader.readLine())!=null){
       char_counter+=line.length()+x_value;
}and the next time read the log file, i will skip all the lines that read in previous time.
BufferedReader reader = new BufferedReader(new FileReader(logFileName));
reader.skip(char_counter);
while((line=reader.readLine())!=null){
       char_counter+=line.length()+x_value;
}with x_value is 1 or 2 depended on line end with "\n" or "\r\n".
so, how to know which is the char line ending with?
Edited by: secmask on Feb 21, 2009 5:46 AM

Answer 1

Alright, the BufferedReader method readLine() reads all text until it finds a \n character. And then next time you call it it will automatically continue from where it left out.
try this out it should show it as an example
import java.io.*;
public class readLineTest {
    static FileOutputStream filename;
    static BufferedReader input;
    public static void main(String[] args)
        try
            filename = new FileOutputStream("logFile.txt", false);
        catch (IOException e)
            //blank
        PrintStream output = new PrintStream(filename);
        output.println("this is the first line");
        output.println("this is the second line");
        output.println("this is the third line");
        try
            input = new BufferedReader(new FileReader("logFile.txt"));
        catch(IOException e)
            //blank
        for(int i = 0; i < 3; i++)
            try
                System.out.println(input.readLine());
            catch(IOException e)
                //blank
}