Resources inside JAR - problem

I have a strange problem with resources inside JARs.
I can't load any resource form a JAR file (for example a .property file or .png icon).
It's not a problem with my progams only. JDBC drivers doesn't work because they cannot find .properties files while they work well when, the driver JAR i uncompressed. It happens every time when some resouces are inside JAR library (classes are loade correctly). The same project runs well on my friend's computer while I've got an error on my computer.
I tried it on WinXP and Win2003 Server - the same. My java version 1.5.0_06-b05 (but I had the same problem with older versions).
I figured out that I can find a file inside a JAR, open a stream, load data and everything is OK but data is always 0bytes length. For example using:
ImageIcon myImageIcon = new ImageIcon(getClass().getResource(pathandfilename));
I get empty ImageIcons without any error.
Can anyone help me. Maybe I should find something somwhere in java configuration.
Message was edited by:
peper

But can anyone tell me why my servlet can not access the
contents inside a jar file?? Any suggestions please?
Thanks.Without seeing your code, it is likely that you are trying to use file names (like /some/path/yourFileName.ext), not resource names (loadable from the class loader) like /yourFileName.ext.
Example:
Instead of:
FileInputStream stream = new FileInputStream("/some/path/yourFileName.ext");
do this:
InputStream stream = getClass().getResourceAsStream("/yourFileName.ext");
There are other API's which take either a string file name or a URL. You want to go the URL way, where the URL is taken from the classpath as:
URL url = getClass().getResource("/yourFileName.ext");

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Loading resources from jar - problem

I've got a problem when loading resources from jar.
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package game.player;
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import game.map.MapReader;
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Thanks in advance!

Hi ,
getResource() method argument is not begin with the
character '/' , ex.
Image image1 = new
ImageIcon(cl.getResource("/data/sprites/man6.png")).ge
tImage();
I thought of that, but it's not applicable here because getResource is being called on the ClassLoader, not the Class.

File Not Found inside jar

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b.m.kraju wrote:
Hi All,
Im using applet to access a wav file which is located in the jar file, 1st of all im compiling the applet class, making a jar file(which has the welcome.jar in it) and signing the jar file and then archiving the jar file in the HTML code. following is the code used in the java applet file.You can't open a resource inside a jar file as a RandomAccessFile or any other form of File.

Can't get file from resource in jar.

hi,
I'm using the folowing mechanism to get a configuration file from my classes jar file.
URL configUrl = Config.class.getResource("/resources/"+fileName);
File ressourceFile = new File(configUrl.toURI());while this is working perfectly when i run my app in stand-alone it fails in JavaWebStart. it gives me the folowing error :
java.lang.IllegalArgumentException: URI is not hierarchical
     at java.io.File.<init>(Unknown Source)
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Is there something I am doing wrong?
thanx,
Patrice.

ok thanx.
in the end I copy the file locally with :
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} catch (IOException e){
}it works perfectly.
thx.

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Edited by: kmthien on Aug 2, 2010 3:05 AM

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Message was edited by:
a.rippich
Message was edited by:
a.rippich

Dear PCR Barry,
I am afraid that I must agree with my colleague Kostas, who replied to your first teststand post. These are very tricky, indepth issues, and will require quite significant investigation. Furthermore, it will be very difficult for us to answer via the forums as we will likely need more input from yourself. As previously suggested, if you have a Standard Service Program (SSP), you can generate a Service Request by calling or e-mailing your local branch.
Thank you for your time, and I am sorry that I have been unable to help you further,
Best wishes,
Rich R
Applications Engineer
National Instruments UK & Ireland

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Resources inside JAR - problem

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