remove a portion from a file

Hi,
I have a text file and I looking for a way to delete all the end of the file, meaning delete a portion from a token I can provide until the end of the file.
For Example, if my file is:

Today is Sunday
Tomorrow is Monday
delete from here
the hour is XXXX
goodbye.

and I want to delete all the lines from:delete from here including delete from here(which I always know that exist)

Does anyone knows on a good way to do it?
Thanks

I think there may be a truncate method that you can use to trim off the end of a file. Look at the API doc's Index under t

Thanks for the reply but I can't find anything like that.
Any other ideas?

What version of java do you have? I see truncate in the 1.4 version.

I'm using java 1.5
can you please give more details please,I probably looked in the wrong place

o.k I found what you referred to and it's not what I was looking for.
Any other suggestions maybe?

Quote:

---

not what I was looking for

---

What are you looking for?
Another solution is to copy the parts of the file you want, delete the original, rename the copy.

Read the file into a StringBuilder until you get to the "delete from here" line. Write the string in the StringBuilder back to the file.

Here is another way to do that.

Code:

---

    public static void main(String[] args) {
        BufferedReader inputFile = null;
        PrintWriter outputFile = null;
       
        try {
            inputFile = new BufferedReader(new FileReader("files/inputFile.txt"));
            outputFile = new PrintWriter("files/outputFile.txt");

            String lineread;

            // Loop through and read each line
            while (!(lineread = inputFile.readLine()).equals("delete from here")) {
                outputFile.println(lineread);
            }
        }
        catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }
        catch (IOException ex) {
            ex.printStackTrace();
        }
        finally {
            try {
                inputFile.close();
                outputFile.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }

---

I'm boggled at the OP's need to ask for code. Being able to read and write files, and to change the contents of a file is a fundamental skill of any programmer. Its typically the third or so program assignment in any class, not much more difficult than Hello World.

Is this just a trivial homework assignment, the kind we should *not* be giving code for.

How can you learn without doing. As Yoda says, there is no try, only do or not do.

Yes, that's true pal. As you said I never give a code to anyone without any attempt. But I give this just to help him, because I thought to post a code after a long time. So I choose this thread. Because I want to keep-alive with a code as well. If you can, but I don't think so, check my few past replays. I never give a code without any help.

I hope you have an idea what I'm talking about.

Thanks Eranga,
I agree with both of you. but this is also funny cause yesterday after I didn't find a specific function that does what I want(that what I was looking for, Norm)I decided to go on the old fashion way exactly as the way you posted Eranga.
So of course I know to write a code that trivial but thanks a lot for all of your help everybody.

It's ok, I've help you to solve the question. But what fishtoprecords is says 100% correct. Pay attention on that in grate depth.

ANother method to change the length of a file is setLength().
Did you look at that?