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Read file within same JAR as applet

Posted on 2002-05-28
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Last Modified: 2011-10-03
Not sure if this is possible, but here goes.
I currently have a JAR'd applet that reads a data file using the URL class. This opens a separate http connection after the JAR has unpacked & applet started.
I have added the data file to the JAR but the applet still looks for the file separately.
Seeing as there's no problem loading images from within the JAR, is there any way to read any type of file this way?
I know that I could store the file as a .GIF image and use PixelGrabber but this is a "last resort".
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Question by:BOINGED
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6 Comments
 
LVL 25

Expert Comment

by:Tomas Helgi Johannsson
ID: 7038835
  Hi!

Look at this API : http://java.sun.com/j2se/1.3/docs/api/java/util/jar/JarFile.html
There is a method (getInputStream ) which gives you access to the data in the specified file in the JARFile.
All you need to do is create an instance of the JARFile class.

Regards,
  Tomas Helgi
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LVL 92

Expert Comment

by:objects
ID: 7038856
You can read any type of file from your jar.
Use the Class method getResourceAsStream() to open the file.
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Author Comment

by:BOINGED
ID: 7055937
Does anyone have some example code for either of the two solutions?
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LVL 92

Accepted Solution

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objects earned 100 total points
ID: 7057949
InputStream in = getClass().getResourceAsStream(resourcename);
// then simply read your file from input stream
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LVL 25

Expert Comment

by:Tomas Helgi Johannsson
ID: 7058806
 Hi!

Look at this web page :
http://www.onjava.com/pub/a/onjava/2001/04/12/signing_jar.html?page=3
or this
http://www.superliminal.com/sources/JarLoader.java.html

Hope these examples help you.

Regards,
 Tomas Helgi
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LVL 92

Expert Comment

by:objects
ID: 7273191
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