How do I make an Applet read a file on my web host?

How do I make an Applet read a file on my web host?
I am wanting to put a file on my web host that has usernames and user details and other stuff on it...
I was wondering whether anyone knows how to make the Applet open a file on my webserver, check if the username exists, if not add to the file the username and details?
thanks

URL myURL = new URL(getDocumentBase(), filename);
InputStream myInputStream = myURL.openStream();
DataInputStream dis = new DataInputStream(myInputStream);
String oneLine = dis.readLine();
Use output stream for writing..
hope this works !!!

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Adobe Reader version 9.3.0 installed through GPO has been running on WinXP Pro SP3 without a problem for months
Patching Method
I copied the following files to local C:\V932 folder:
AdbeRdr930_en_US.msi (original v9.3 MSI installation file)
AdbeRdrUpd932_all_incr.msp (the downloaded patch file released in April 2010)
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When I compare Adobe related files in the following folders, some files do not match:
C:\Program Files\Adobe\Reader 9.0\Reader
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As you said -
When I check Help - About, it shows that I have 9.3.2
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Properties of AcroRd32.exe in C drive shows File version 9.3.0.148
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Follwing XML is one of my XMP file created by lightroom2.
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<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2-c020 1.124078, Tue Sep 11 2007 23:21:40        ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about=""
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   <tiff:Orientation>8</tiff:Orientation>
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<rdf:Description rdf:about=""
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    <exif:Return>0</exif:Return>
    <exif:Mode>2</exif:Mode>
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   <exif:CustomRendered>0</exif:CustomRendered>
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<rdf:Description rdf:about=""
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<rdf:Description rdf:about=""
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       <crs:RedHue>0</crs:RedHue>
       <crs:RedSaturation>0</crs:RedSaturation>
       <crs:GreenHue>0</crs:GreenHue>
       <crs:GreenSaturation>0</crs:GreenSaturation>
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       <crs:BlueSaturation>0</crs:BlueSaturation>
       <crs:FillLight>0</crs:FillLight>
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       <crs:HueAdjustmentOrange>0</crs:HueAdjustmentOrange>
       <crs:HueAdjustmentYellow>0</crs:HueAdjustmentYellow>
       <crs:HueAdjustmentGreen>0</crs:HueAdjustmentGreen>
       <crs:HueAdjustmentAqua>0</crs:HueAdjustmentAqua>
       <crs:HueAdjustmentBlue>0</crs:HueAdjustmentBlue>
       <crs:HueAdjustmentPurple>0</crs:HueAdjustmentPurple>
       <crs:HueAdjustmentMagenta>0</crs:HueAdjustmentMagenta>
       <crs:SaturationAdjustmentRed>0</crs:SaturationAdjustmentRed>
       <crs:SaturationAdjustmentOrange>0</crs:SaturationAdjustmentOrange>
       <crs:SaturationAdjustmentYellow>0</crs:SaturationAdjustmentYellow>
       <crs:SaturationAdjustmentGreen>0</crs:SaturationAdjustmentGreen>
       <crs:SaturationAdjustmentAqua>0</crs:SaturationAdjustmentAqua>
       <crs:SaturationAdjustmentBlue>0</crs:SaturationAdjustmentBlue>
       <crs:SaturationAdjustmentPurple>0</crs:SaturationAdjustmentPurple>
       <crs:SaturationAdjustmentMagenta>0</crs:SaturationAdjustmentMagenta>
       <crs:LuminanceAdjustmentRed>0</crs:LuminanceAdjustmentRed>
       <crs:LuminanceAdjustmentOrange>0</crs:LuminanceAdjustmentOrange>
       <crs:LuminanceAdjustmentYellow>0</crs:LuminanceAdjustmentYellow>
       <crs:LuminanceAdjustmentGreen>0</crs:LuminanceAdjustmentGreen>
       <crs:LuminanceAdjustmentAqua>0</crs:LuminanceAdjustmentAqua>
       <crs:LuminanceAdjustmentBlue>0</crs:LuminanceAdjustmentBlue>
       <crs:LuminanceAdjustmentPurple>0</crs:LuminanceAdjustmentPurple>
       <crs:LuminanceAdjustmentMagenta>0</crs:LuminanceAdjustmentMagenta>
       <crs:SplitToningShadowHue>0</crs:SplitToningShadowHue>
       <crs:SplitToningShadowSaturation>0</crs:SplitToningShadowSaturation>
       <crs:SplitToningHighlightHue>0</crs:SplitToningHighlightHue>
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       <crs:ParametricHighlights>0</crs:ParametricHighlights>
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         <rdf:li>32, 22</rdf:li>
         <rdf:li>64, 56</rdf:li>
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         <rdf:li>192, 196</rdf:li>
         <rdf:li>255, 255</rdf:li>
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ava.lang.NullPointerException
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for 1.5:
deployment.javapi.jre.1.5.0.args=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
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C:\Documents and Settings\your user\Application Data\Sun\Java\Deployment\log\plugin...log
I think for linux this is somewhere in youruserdir/java (hidden directory)

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Please see this thread: https://support.mozilla.com/en-US/questions/740322
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