• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Tim Cooke
  • Ron McLeod
  • paul wheaton
  • Jeanne Boyarsky
Sheriffs:
  • Paul Clapham
  • Devaka Cooray
Saloon Keepers:
  • Tim Holloway
  • Roland Mueller
  • Himai Minh
Bartenders:

Reading one line from a text

 
Ranch Hand
Posts: 518
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi
I am having ten lines in my text file.I want to read first and third line.please help me with a sample code.

Thanks
 
Rancher
Posts: 43081
77
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I'd suggest to read the first 3 lines, and simply to ignore the second line. Here's some example code that reads from a file line by line.
 
preethi Ayyappan
Ranch Hand
Posts: 518
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I am already having a code which reads line by line.but i need to read only the first 3 lines out of 10 lines.

Code:

import java.io.*;
class FileRead1
{
public static void main(String args[])
{
try{

FileInputStream fstream = new FileInputStream("myfile.txt");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
while ((strLine = br.readLine()) != null) {

System.out.println (strLine);
}

in.close();
}catch (Exception e){//Catch exception if any
System.err.println("Error: " + e.getMessage());
}
}
}
 
Rancher
Posts: 3742
16
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Instead of having a loop, just read the first line and do what you need to do with it, read the second line and ignore it, read the third line and do what you need to do with it and then close the input stream.
 
preethi Ayyappan
Ranch Hand
Posts: 518
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks for your reply.if you show me in codes ,that will do better.
 
Java Cowboy
Posts: 16084
88
Android Scala IntelliJ IDE Spring Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Preethi, it is very simple. Throw away your while-loop. Just call br.readLine() three times.
 
preethi Ayyappan
Ranch Hand
Posts: 518
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thank you for your help.Now it works fine.
reply
    Bookmark Topic Watch Topic
  • New Topic