remove NEWLINE at the end of the file

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gk - 04 Apr 2006 03:05 GMT

i use the code below to read a text file.

try {
BufferedReader in = new BufferedReader(new
FileReader("infilename"));
String str;
while ((str = in.readLine()) != null) {
process(str);
}
in.close();
} catch (IOException e) {
}

but when the file has a NEWLINE at the END ....the code also read that.

i just dont want to read that NEWLINE as soon as i come to the end.

what i have to do ?

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Roedy Green - 04 Apr 2006 04:26 GMT

>but when the file has a NEWLINE at the END ....the code also read that.
>
>i just dont want to read that NEWLINE as soon as i come to the end.

you mean you are getting a "" on the tail end of the file?

You may have multiple nls on the end of your file. Check with a hex
editor and chop them.

You may also just ignore 0-length lines.

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Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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gk - 04 Apr 2006 05:28 GMT

>You may have multiple nls on the end of your file.....Check with a hex editor and chop them.

cant i do it by programatically ?

can i chop before reading the file by programatically ? How ?

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Roedy Green - 04 Apr 2006 06:04 GMT

>can i chop before reading the file by programatically ? How ?

You can write a tidier that chops blank lines off the tail end of the
file. Whenever you read a blank line, increment a counter. Whenever
you hit an non blank line, emit counter blank lines , zero the counter
then emit the line.

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Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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Knute Johnson - 04 Apr 2006 06:32 GMT

> i use the code below to read a text file.
>
[quoted text clipped - 14 lines]
>
> what i have to do ?

If you know that you will never have a line in your data that is empty
then just ignore it;

while ((str = in.readLine()) != null) {
if (!str.equals(""))
process(str);

Signature

Knute Johnson
email s/nospam/knute/

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gk - 05 Apr 2006 02:09 GMT

I think this will look like much more impressive

while ((str = in.readLine()) != null &&(!str.equals("")) {
//if (!str.equals(""))
process(str);

Thnak you

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Gordon Beaton - 05 Apr 2006 08:23 GMT

> I think this will look like much more impressive
>
> while ((str = in.readLine()) != null &&(!str.equals("")) {
> //if (!str.equals(""))
> process(str);

If your goal is to impress, why stop there when you can put
*everything* in the loop header?

while ((str = in.readLine()) != null && (!str.equals("") && (process(str) || true)));

/gordon

(See also http://www.m-w.com/cgi-bin/dictionary?va=irony)

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Roedy Green - 05 Apr 2006 09:07 GMT

>process(str) || true

what a strange way to code.

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Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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Gordon Beaton - 05 Apr 2006 09:29 GMT

> what a strange way to code.

Follow the link I posted.

/gordon

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gk - 11 Apr 2006 11:57 GMT

I apologige , if the adjective has hurt you. I understand, that was the
improper usage after all. english is not my native language.

I wanted to mean, how the code looks like if i put that way. Of course,
the code has been borrowed from you but customized.

language should not taken into account.

thank you

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remove NEWLINE at the end of the file

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