Masses of white space, how to get rid of it?

Question

Hi every body.
Im reading in an XMl file, changing a few values then printing it back to the same file. But everytime I read it in and print it back, its putting a blank line after every other line. So if I read in a file that looked like this:::
<record>
     <lesson_id>01</lesson_id>
     <lesson_title>title 0</lesson_title>
     <max_time_allowed>000:000</max_time_allowed>
     <time_limit_action>tla</time_limit_action>
     <launch_data>this is the launch data</launch_data>
     <description>d</description>
     <mastery_score>2003</mastery_score>
     <file_href>here</file_href>
</record>
After I cange some values and print it back it would look like this::::
<record>
     <lesson_id>01</lesson_id>
     <lesson_title>title 0</lesson_title>
     <max_time_allowed>000:000</max_time_allowed>
     <time_limit_action>tla</time_limit_action>
     <launch_data>this is the launch data</launch_data>
     <description>d</description>
     <mastery_score>2003</mastery_score>
     <file_href>here</file_href>
</record>
Then after I read it in again and printed it back it would then look like this::::
<record>
     <lesson_id>01</lesson_id>
     <lesson_title>title 0</lesson_title>
     <max_time_allowed>000:000</max_time_allowed>
     <time_limit_action>tla</time_limit_action>
     <launch_data>this is the launch data</launch_data>
     <description>d</description>
     <mastery_score>2003</mastery_score>
     <file_href>here</file_href>
</record>
The more time I read it in the more spaces are inserted. How can I stop this from happening?
I read it in like this....
java.io.File file = new java.io.File(profileFileName);
XmlDocument doc = null;
doc = XmlDocument.createXmlDocument(file.toURL().toString(), false);
NodeList list = doc.getElementsByTagName("table");
And print it back like this.....
doc.normalize();
doc.write(new java.io.FileWriter(profileFileName),"ISO-8859-1");
All help appreciated.
Thanks

Answer 1

Hi ok I found this some where on http://www.javaalmanac.com
try {
// Prepare the DOM document for writing
Source source = new DOMSource(doc);
// Prepare the output file
File outPutFile = new File(FileName);
Result result = new StreamResult(outPutFile);
// Write the DOM document to the file
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(source, result);
} catch (TransformerConfigurationException e) {
} catch (TransformerException e) {
It prints to the file ok even though it print it like this <tag><anotherTag></anotherTag></tag>
rather than
<tag>
<anotherTag>
</anotherTag>
</tag>
But that doesnt matter as it saves file space.
BUT
now I have another problem ...
After about 10 records have been added the program slows dowm and its gets slower and slower and slower. Obviously its coz the fiels getting bigger and bigger. At which point does it get slower and why. Is it the printing bit that gets slower or the reading in. Are there faster ways to parse a document, which is the fastest parser?
Sorry for all the questions, im not being lazy. I tried to tackle these problems long time ago but ended up using a database, now I want to try again but Im restricted by time.
Anyways cheers all.
G