jar question

Re: jar question

On Mon, 01 Sep 2003 20:40:15 +0200, Christof Laeremans
<christof_nospa m_laeremans@yah oo_againnospam_ co.uk> two-finger typed:
[color=blue]
>Hello,
>
>I'm trying to write an applet that shows the exif information of a jpeg
>image. For displaying this information I'm going to use the classes
>found on this website http://www.drewnoakes.com/code/exif/.
>
>But, they are in an jar file. Is there a way to import this jar file
>into my applet so I can use the classes and methods for getting this
>information?[/color]

Although, officially you can add more than one JAR file into the ARCHIVE
tag of the APPLET tag (or the ARCHIVE parameter of the OBJECT tag), you
could also:
1) unJAR the classes and JAR your classes together with the Exim classes
for a single JAR file.
2) only reference the Exim JAR file with ARCHIVE, and put your own classes
unarchived into the site.
[color=blue]
>
>Thanks,
>
>Christof Laeremans[/color]

Cheers.

Re: jar question

Neomorph wrote:[color=blue]
> On Mon, 01 Sep 2003 20:40:15 +0200, Christof Laeremans
> <christof_nospa m_laeremans@yah oo_againnospam_ co.uk> two-finger typed:
>
>[color=green]
>>Hello,
>>
>>I'm trying to write an applet that shows the exif information of a jpeg
>>image. For displaying this information I'm going to use the classes
>>found on this website http://www.drewnoakes.com/code/exif/.
>>
>>But, they are in an jar file. Is there a way to import this jar file
>>into my applet so I can use the classes and methods for getting this
>>information ?[/color]
>
>
> Although, officially you can add more than one JAR file into the ARCHIVE
> tag of the APPLET tag (or the ARCHIVE parameter of the OBJECT tag), you
> could also:
> 1) unJAR the classes and JAR your classes together with the Exim classes
> for a single JAR file.
> 2) only reference the Exim JAR file with ARCHIVE, and put your own classes
> unarchived into the site.
>
>[color=green]
>>Thanks,
>>
>>Christof Laeremans[/color]
>
>
> Cheers.[/color]

Hello,

So, I've created my java applet and imported it in an HTML file with the
applet tag

<applet
archive = "photoexif/metadata-extractor-2.1.jar"
code = "photoexif/Exif.class"
name = "TestApplet "
width = "400"
height = "20"
hspace = "0"
vspace = "0"
align = "middle"[color=blue]
>[/color]
</applet>

But, the only thing I see is a gray bar with no text. When I start the
applet with JBuilder I can see the exif off the selected photo.

What is wrong ?

Regards,

Christof Laeremans

Re: jar question

(See below)

On Wed, 03 Sep 2003 08:44:09 +0200, Christof Laeremans
<christoflaerem ans_nospam_@yah oo_nospam.co.uk > two-finger typed:[color=blue]
>Neomorph wrote:[color=green]
>> On Mon, 01 Sep 2003 20:40:15 +0200, Christof Laeremans
>> <christof_nospa m_laeremans@yah oo_againnospam_ co.uk> two-finger typed:[color=darkred]
>>>But, they are in an jar file. Is there a way to import this jar file
>>>into my applet so I can use the classes and methods for getting this
>>>informatio n?[/color]
>>
>> Although, officially you can add more than one JAR file into the ARCHIVE
>> tag of the APPLET tag (or the ARCHIVE parameter of the OBJECT tag), you
>> could also:
>> 1) unJAR the classes and JAR your classes together with the Exim classes
>> for a single JAR file.
>> 2) only reference the Exim JAR file with ARCHIVE, and put your own classes
>> unarchived into the site.
>> [/color]
>So, I've created my java applet and imported it in an HTML file with the
>applet tag
>
><applet
> archive = "photoexif/metadata-extractor-2.1.jar"
> code = "photoexif/Exif.class"[/color]

You can't add a path to the class in the CODE tag, you need to set the
codebase, instead:

codebase="photo exif"
archive = "metadata-extractor-2.1.jar" <!-- from codebsae -->
code = "Exif.class " <!-- from codebsae -->
[color=blue]
> name = "TestApplet "
> width = "400"
> height = "20"
> hspace = "0"
> vspace = "0"
> align = "middle"[color=green]
> >[/color]
></applet>
>
>But, the only thing I see is a gray bar with no text. When I start the
>applet with JBuilder I can see the exif off the selected photo.[/color]

The tags cannot be used that easily, they have very specific functions of
their own.

I'm quite interested in Exif - isn't it an extension to JPG that adds
information about how the image was taken ?


Cheers.

Re: jar question

Neomorph wrote:[color=blue]
> (See below)
>
> On Wed, 03 Sep 2003 08:44:09 +0200, Christof Laeremans
> <christoflaerem ans_nospam_@yah oo_nospam.co.uk > two-finger typed:
>[color=green]
>>Neomorph wrote:
>>[color=darkred]
>>>On Mon, 01 Sep 2003 20:40:15 +0200, Christof Laeremans
>>><christof_no spam_laeremans@ yahoo_againnosp am_co.uk> two-finger typed:
>>>
>>>>But, they are in an jar file. Is there a way to import this jar file
>>>>into my applet so I can use the classes and methods for getting this
>>>>information ?
>>>
>>>Although, officially you can add more than one JAR file into the ARCHIVE
>>>tag of the APPLET tag (or the ARCHIVE parameter of the OBJECT tag), you
>>>could also:
>>>1) unJAR the classes and JAR your classes together with the Exim classes
>>>for a single JAR file.
>>>2) only reference the Exim JAR file with ARCHIVE, and put your own classes
>>>unarchived into the site.
>>>[/color]
>>
>>So, I've created my java applet and imported it in an HTML file with the
>>applet tag
>>
>><applet
>> archive = "photoexif/metadata-extractor-2.1.jar"
>> code = "photoexif/Exif.class"[/color]
>
>
> You can't add a path to the class in the CODE tag, you need to set the
> codebase, instead:
>
> codebase="photo exif"
> archive = "metadata-extractor-2.1.jar" <!-- from codebsae -->
> code = "Exif.class " <!-- from codebsae -->
>[color=green]
>> name = "TestApplet "
>> width = "400"
>> height = "20"
>> hspace = "0"
>> vspace = "0"
>> align = "middle"
>>
>></applet>
>>
>>But, the only thing I see is a gray bar with no text. When I start the
>>applet with JBuilder I can see the exif off the selected photo.[/color]
>
>
> The tags cannot be used that easily, they have very specific functions of
> their own.
>
> I'm quite interested in Exif - isn't it an extension to JPG that adds
> information about how the image was taken ?
>
>
> Cheers.[/color]

Hello,

I'm going to try that. The exif is indeed an extension for JPG. the
applet works great in my JBuilder IDE (and hopefully now in my bowser ;) )

Regards,

Christof Laeremans

Re: jar question

Christof Laeremans <christof_nospa m_laeremans@yah oo_againnospam_ co.uk> wrote in message news:<bj042l$3o [email protected] s.nl>...[color=blue]
> Hello,
>
> I'm trying to write an applet that shows the exif information of a jpeg
> image. For displaying this information I'm going to use the classes
> found on this website http://www.drewnoakes.com/code/exif/.
>
> But, they are in an jar file. Is there a way to import this jar file
> into my applet so I can use the classes and methods for getting this
> information?
>
> Thanks,
>
> Christof Laeremans[/color]


a jar is the same thing that a group of .class files. You can also
rename it with the zip extention an extract .class files.

Re: jar question

seb wrote:
[color=blue]
> Christof Laeremans <christof_nospa m_laeremans@yah oo_againnospam_ co.uk> wrote in message news:<bj042l$3o [email protected] s.nl>...
>[color=green]
>>Hello,
>>
>>I'm trying to write an applet that shows the exif information of a jpeg
>>image. For displaying this information I'm going to use the classes
>>found on this website http://www.drewnoakes.com/code/exif/.
>>
>>But, they are in an jar file. Is there a way to import this jar file
>>into my applet so I can use the classes and methods for getting this
>>information ?
>>
>>Thanks,
>>
>>Christof Laeremans[/color]
>
>
>
> a jar is the same thing that a group of .class files. You can also
> rename it with the zip extention an extract .class files.[/color]

A better way to do this is to include the jar in your classpath. Timply
type:

java -cp c:\path\to\my\j ar\file\thejarf ile.jar MyMainClass

and your application will include the files in the jarfile when it
executes. There is a similar syntax for javac, and you can include
second party jars this way for applets and web start applications too.

I would definately not recommend unzipping the jar and using the .class
files directly.

Lots more on jars, including use of the manifest file, can be found at
Sun's tutorial site:




Mark McKay