Print data to the beginning of a file

Hi,
I have written this code to wite data to a textfile:
PrintWriter FeedStream = new PrintWriter(new FileOutputStream(feed_path, true));
FeedStream.println(text);
FeedStream.close();The code works fine but it writes the data at the end of the file whereas I want it at the beginning of the file. How to solve this?
Thanks in advance,
leonard

Well, the reason is that I want to print the data in another application and saving the data this way is more convenient.
E.g.
application 1 prints this to a file:
L1 Test=45
L2 Temp=10
then the same application maybe has to write more data to the file at another time, and adding:
L1 Test=39
L2 Temp=12
However application 2 that monitors the file every 6h should analyse the data from the newst to the oldest. For the conveniance when parsing the file with application 2 I want to add the data to the beginning of the file.

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Appending data to the beginning of a file

How do you write data to the first line of a file without overwriting the data which is already present?
Data before:
888826759 100011021
888826767 100011026
888826916 100011024
888826916 100011023
888826940 100011029
888826940 100011028
888857389 100011020
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What I want data to look like after:
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888826916 100011024
888826916 100011023
888826940 100011029
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888857389 100011020
888871480 100011029
I'm trying this, but it doesn't work as it overwrites the first piece of data in the file
file.seek(0);
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Edited by: drakester on Oct 12, 2007 10:59 AM

You might be able to write the file into one of the Collection Lists that maintain order (like LinkedList, but there are others), add the first line, and then rewrite the file from the list. You might also find the Collections methods reverse and rotate could be useful if you add the data at the end of the list.
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1. Create a new file.
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I want to be able to erase the beginning of a file, while writing to the end...WITHOUT reading the whole file and writing it again because that would be a waste of resourses. Obviously I know that option is available.
My situation is that I am adding lines to a log file, and I want to remove any entries that are X hours old. Logging a lot of information would mean that every few seconds, an entry is older than X hours and needs to be removed. It doesnt have a set number of lines so I can't just recycle the file by doing something like: if at line number Y, start at line 1 and remember the current line number.
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Print data to the beginning of a file

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