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how to set image path

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  how to set image path "marcussilfver" <marcussilfver@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000
    Re: how to set image path a24900@googlemail.com.remove-dii-this - 2011-04-27 15:39 +0000
      Re: how to set image path "Lew" <lew@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000
        Re: how to set image path a24900@googlemail.com.remove-dii-this - 2011-04-27 15:39 +0000
      Re: how to set image path "marcussilfver" <marcussilfver@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000
        Re: how to set image path "marcussilfver" <marcussilfver@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000
        Re: how to set image path "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000
        Re: how to set image path "Nigel Wade" <nigel.wade@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000
        Re: how to set image path a24900@googlemail.com.remove-dii-this - 2011-04-27 15:39 +0000
    Re: how to set image path "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:39 +0000

#2431 — how to set image path

  To: comp.lang.java.gui
How can I specify which folder JVM will look for images?
I use getClass().getClassLoader().getResource("myimage")
Right now it looks in ../ directory but I would really like it to look
in my ../../src/ directory

is this possible?

thanks

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#2432

  To: comp.lang.java.gui
On Sep 13, 9:30 pm, marcussilf...@gmail.com wrote:
> How can I specify which folder JVM will look for images?
> I use getClass().getClassLoader().getResource("myimage")
> Right now it looks in ../ directory but I would really like it to look
> in my ../../src/ directory

Put the path for the image directory on the classpath. But your whole
question smells as if you have messed up your classpath and build
settings. You do not want to have to look around in your source
environment for resources. The resources should have been copied into
the target (class directory or jar).

Also, consider using getClass().getResource(). It has a slightly
different way to search for resources compared to
getClass().getClassLoader().getResource() when the resource name
starts with "/". This "absolute" way to search for resources is often
what you want.

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#2435

  To: comp.lang.java.gui
#
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Date: Thu, 13 Sep 2007 21:10:40 -0400
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a24900@googlemail.com wrote:
> On Sep 13, 9:30 pm, marcussilf...@gmail.com wrote:
>> How can I specify which folder JVM will look for images?
>> I use getClass().getClassLoader().getResource("myimage")
>> Right now it looks in ../ directory but I would really like it to look
>> in my ../../src/ directory
> 
> Put the path for the image directory on the classpath. But your whole
> question smells as if you have messed up your classpath and build
> settings. You do not want to have to look around in your source
> environment for resources. The resources should have been copied into
> the target (class directory or jar).
> 
> Also, consider using getClass().getResource(). It has a slightly
> different way to search for resources compared to
> getClass().getClassLoader().getResource() when the resource name
> starts with "/". This "absolute" way to search for resources is often
> what you want.

Good advice, but I believe in relative paths myself.

Since one of the purposes of Java is portability, one should avoid hardcoded 
absolute paths as they are not portable.

-- 
Lew

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#2442

  To: comp.lang.java.gui
On Sep 14, 3:10 am, Lew <l...@lewscanon.com> wrote:
> Good advice, but I believe in relative paths myself.
>
> Since one of the purposes of Java is portability, one should avoid hardcoded
> absolute paths as they are not portable.

These "absolute" resource parts are portable, because they start
"relatively" from the "roots" of classpath elements.

Example: If you have a classpath with /pathA:/pathB:/C.jar:/D.jar then
a resource called /images/imageA.png is searched

1) relative to /pathA as /pathA/images/imageA.png

if not found

2) relative to /pathB as /pathB/images/imageA.png

if not found

3) "Absolute" in the jar /C.jar as a jar/zip file entry with the name /
images/imageA.png

if not found

4) "Absolute" in the jar /D.jar as a jar/zip file entry with the name /
images/imageA.png

I consider the last two parts of the example, 3) and 4), the most
important ones, since it means I can fully predict which names I have
to use when packing the resources into the jar. And I can put exactly
these names into my code as arguments to Class.getResource()

I consider that as more flexible, fully portable and providing more
control than having to mess with ../../something. Such a resource name
can break as soon as I e.g. refactor the package name of the class
from which I look up the resource.

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#2436

  To: comp.lang.java.gui
> Also, consider using getClass().getResource(). It has a slightly
> different way to search for resources compared to
> getClass().getClassLoader().getResource() when the resource name
> starts with "/". This "absolute" way to search for resources is often
> what you want.

Thanks for answering.
I must use relative paths, my resource names does not start with "/".
I may not have been all that clear in my previous post.

> The resources should have been copied into
> the target (class directory or jar).
>

I can not put the resources in my class directory, since I use Jigloo
GUI builder which dont allow me to specify images in other directories
but the "src" directory or subfolders of it. When running my app the
JVM looks in the bin folder for the image.

my directory hierarchy looks like this:

myProject
  bin
    myapp_classes     // classes generated from my java source by
Eclipse
    images            // these images are found by JVM, but not by
Jigloo
  src
    myapp_src         // my java source code
    images            // these images are found by Jigloo, but not by
JVM

So right now I have 2 folders named "images" containing all my images.
One is placed as a subfolder of the bin folder and the other is placed
as a subfolder of the src folder. The content of the images folders
are identical.
If I delete the bin/images/ folder then the image will not be found at
runtime, they will be found by Jigloo though.
If I instead deletes the src/images/ folder then no image will be seen
in Jigloo, they will be found at runtime though.

What can I do to make JVM and Jigloo use the same path for images? I
see 2 solutions to this:
1) have 2 "images" directories (like my current solution)
2) have both .class files and .java files on the class path, like
MyProject
  src
    myapp_src_and_classes
    images

Any other ideas on the best way to solve this?

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#2437

  To: comp.lang.java.gui
I send this post because my previous was linebreaked in a way that
made the directory hierarkies hard to read. Same content otherwise.
Read this one instead.

> > Also, consider using getClass().getResource(). It has a slightly
> > different way to search for resources compared to
> > getClass().getClassLoader().getResource() when the resource name
> > starts with "/". This "absolute" way to search for resources is often
> > what you want.
>
> Thanks for answering.
> I must use relative paths, my resource names does not start with "/".
> I may not have been all that clear in my previous post.
>
> > The resources should have been copied into
> > the target (class directory or jar).
>
> I can not put the resources in my class directory, since I use Jigloo
> GUI builder which dont allow me to specify images in other directories
> but the "src" directory or subfolders of it. When running my app the
> JVM looks in the bin folder for the image.
>
> my directory hierarchy looks like this:
>
> myProject
>   bin
>     myapp_classes     // generated from my java source
>     images            // found by JVM, but not by Jigloo
>   src
>     myapp_src         // java source code
>     images            // found by Jigloo, but not by JVM
>
> So right now I have 2 folders named "images" containing all my images.
> One is placed as a subfolder of the bin folder and the other is placed
> as a subfolder of the src folder. The content of the images folders
> are identical.
> If I delete the bin/images/ folder then the image will not be found at
> runtime, they will be found by Jigloo though.
> If I instead deletes the src/images/ folder then no image will be seen
> in Jigloo, they will be found at runtime though.
>
> What can I do to make JVM and Jigloo use the same path for images? I
> see 2 solutions to this:
> 1) have 2 "images" directories (like my current solution)
> 2) have both .class files and .java files on the class path, like
> MyProject
>   src
>     myapp_src_and_classes
>     images
>
> Any other ideas on the best way to solve this?

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#2438

  To: comp.lang.java.gui
marcussilfver@gmail.com wrote:
..
>What can I do to make JVM and Jigloo use the same path for images? 

I am going to make a WAG* that this question really 
reduces to running a 'built' project, as opposed to 
running it from the local filesystem

If that WAG turns out to be correct, I suggest you 
use Ant to build the project, never try and test it as
'loose' class files, and proceed beyond this (apparent)
difficulty.

* Without even reading the entire post properly.  
(shrugs) Sue me.

-- 
Andrew Thompson
http://www.athompson.info/andrew/

Message posted via JavaKB.com
http://www.javakb.com/Uwe/Forums.aspx/java-gui/200709/1

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#2439

  To: comp.lang.java.gui
 marcussilfver@gmail.com wrote:

>> Also, consider using getClass().getResource(). It has a slightly
>> different way to search for resources compared to
>> getClass().getClassLoader().getResource() when the resource name
>> starts with "/". This "absolute" way to search for resources is often
>> what you want.
> 
> Thanks for answering.
> I must use relative paths, my resource names does not start with "/".
> I may not have been all that clear in my previous post.
> 
>> The resources should have been copied into
>> the target (class directory or jar).
>>
> 
> I can not put the resources in my class directory, since I use Jigloo
> GUI builder which dont allow me to specify images in other directories
> but the "src" directory or subfolders of it. When running my app the
> JVM looks in the bin folder for the image.
> 
> my directory hierarchy looks like this:
> 
> myProject
>   bin
>     myapp_classes     // classes generated from my java source by
> Eclipse
>     images            // these images are found by JVM, but not by
> Jigloo
>   src
>     myapp_src         // my java source code
>     images            // these images are found by Jigloo, but not by
> JVM
> 
> So right now I have 2 folders named "images" containing all my images.
> One is placed as a subfolder of the bin folder and the other is placed
> as a subfolder of the src folder. The content of the images folders
> are identical.
> If I delete the bin/images/ folder then the image will not be found at
> runtime, they will be found by Jigloo though.
> If I instead deletes the src/images/ folder then no image will be seen
> in Jigloo, they will be found at runtime though.
> 
> What can I do to make JVM and Jigloo use the same path for images? I
> see 2 solutions to this:
> 1) have 2 "images" directories (like my current solution)
> 2) have both .class files and .java files on the class path, like
> MyProject
>   src
>     myapp_src_and_classes
>     images
> 
> Any other ideas on the best way to solve this?

I'm not sure what the ideal solution would be. Probably to use ant to create a
distribution jar containing the classes and the images, and then run that.

One less than ideal solution, if this is Linux or UNIX as the path names appear
to be, would be to either hard or symbolic link the two image directories. At
least that way you would only have one actual image directory, with the other
being a link to it. There would only be one copy of each image, and only one
directory to maintain.

-- 
Nigel Wade, System Administrator, Space Plasma Physics Group,
            University of Leicester, Leicester, LE1 7RH, UK 
E-mail :    nmw@ion.le.ac.uk 
Phone :     +44 (0)116 2523548, Fax : +44 (0)116 2523555

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#2444

  To: comp.lang.java.gui
On Sep 14, 2:55 pm, marcussilf...@gmail.com wrote:
> I must use relative paths, my resource names does not start with "/".

Which is IMHO one of your problems.

> I can not put the resources in my class directory, since I use Jigloo
> GUI builder which dont allow me to specify images in other directories

The your tool is broken and you should consider using something else.

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#2440

  To: comp.lang.java.gui
On Thu, 13 Sep 2007 12:30:39 -0700, marcussilfver@gmail.com wrote,
quoted or indirectly quoted someone who said :

>How can I specify which folder JVM will look for images?
>I use getClass().getClassLoader().getResource("myimage")
>Right now it looks in ../ directory but I would really like it to look
>in my ../../src/ directory

The image path is the same as the classpath.  See
http://mindprod.com/jgloss/classpath.html for how the classpath works.

Usually you put resources in a jar file where you have better control
over them.

see http://mindprod.com/jgloss/jar.html

-- 
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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