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For 2023 - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
End of File on a Java BufferedReader

How do you sense if a BufferedReader in Java has reached the end of file? Like so many "things Java" it's easy enough to do ... once you find that vital method in the lists of thousands of calls!

There's no "eof"; there's no checking the input to see if you got nothing back after a read as that happens when at the end of file AND at embedded blank lines. But the ready method tells you if you have data available of not - and that's the one to use.

Here's a sample piece of code in Java to echo the first 12 lines of a file, and to count all the lines in the file too.

File myFile = new File ("access_log.xyz");
BufferedReader newFile = new BufferedReader(new FileReader(myFile));
int k=1;
while (true){
  if (! newFile.ready()) break;
  String next_line = newFile.readLine();
  if (k<12){
    System.out.println("Line Number:"+k+" - "+next_line);

(written 2007-06-22)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
J713 - Java - More Input and Output
  [2420] Exceptions in Java - why and how - (2009-09-24)
  [4350] Keyboard reader for Java programming newcomers - (2014-12-12)
  [4414] Java - converting an integer to a fixed length string - (2015-02-04)
  [4420] Flexibility in input - read from file, web resource or keyboard - (2015-02-08)

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Fancy going to Glastonbury?
End of File on a Java BufferedReader
The kind spirit of Melksham
What proportion of our web traffic is robots?
Trying things in Python
Outputting numbers as words - MySQL with Perl or PHP
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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Comment: "//another way to do it ..."
2 unpublished comments pending on this page

Comment by himJ (published 2010-03-04)
//another way to do it
import java.io.*;
class bufferedDemoInput{
public static void main(String arg[]){
int ch=0;

//opens a file from the given unabsolute address;
File tempFile=new File("/HIMANSHUJ/myFile.txt");


BufferedReader filer=new BufferedReader(new FileReader(tempFile));
//create an inputstream to the opened file

//detects end of file
while( (ch=filer.read())!= -1)

catch(FileNotFoundException e){
catch(IOException e){


} [#3478]

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