need help to read from a file and print it on console

[Naga Niranjan]

Hi all,
I need help to read from a file and print it on console. Plz help me.
Bye

[Steve McCann]

The Java Tutorial covers file IO in an easy to understand way.

[Naga Niranjan]

Thank you Steve.

My problem solved with your advise by using RandomAccessFile. But iam facing some problem at the end of file while reading. It is showing NullPointerException. How can i overcome it.

[Layne Lund]

It depends on what is causing the NullPointerException. We will be able to more easily able to help you if you post your code and the full error message.

Layne

[Ernest Friedman-Hill]

Hi,

Welcome to JavaRanch!

A bit of business: you may not have read our naming policy on the way in. It requires that you use a full, real (sounding) first and last name for your display name. A single name isn't enough. You can change your display name
here. Thanks!

[Naga Niranjan]

Originally posted by Layne Lund:
It depends on what is causing the NullPointerException. We will be able to more easily able to help you if you post your code and the full error message.

Layne

The following is my code

import java.io.*;

class Commands
{
public static void main(String[] args)
{
try{
RandomAccessFile raf=new RandomAccessFile("Woc.txt","r");
long len=raf.length();
for(long clen=0;clen<len
{
String s=raf.readLine();
System.out.println(s);
clen+=s.length();
}
raf.close();
}
catch(IOException e)
{
}



}
}

this is the error:
Exception in thread "main" java.lang.NullPointerException

[Ernest Friedman-Hill]

You're not counting the newlines, so the number of bytes read will actually be larger than "clen". The idiomatic way to read all the lines in a file in Java looks like this:

BufferedReader reader = new BufferedReader(new FileReader(filename));
String line;
while ((line = reader.readLine()) != null) {
    System.out.println(line);
}

[Matt Fielder]

please use code tags.

[Naga Niranjan]

Originally posted by Matt Fielder:
please use code tags.

What are code tags? I didn't understand what you are saying?