Re: JAR in a JAR?

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 29 Aug 2008 16:07:59 -0400

Message-ID:

<48b85716$0$90267$14726298@news.sunsite.dk>

Jason Cavett wrote:

On Aug 29, 3:32 pm, Arne Vajh?j <a...@vajhoej.dk> wrote:

No - resources are like classes and are fine to load from inside
the jar.

With one caveat though: you can only read resources from inside
the jar - you can not modify them from your app.

That's what I thought...and that is what's causing my problem.

I have various resources in a JAR that I cannot seem to find or load
correctly.

Here is the error I receive...
[java] Exception in thread "main"
java.lang.ExceptionInInitializerError
[java] at
myproject.gui.components.view.menu.MainMenu.getNewMenuItem(Unknown
Source)
...

Here is my Ant script for the JAR.

<jar destfile="${dist}/${build.name}.jar">


<manifest>
<attribute name="Built-By" value="${user.name}" />
<attribute name="Release-Version" value="${version}" />
<attribute name="Main-Class" value="myproject.Main" />
<attribute name="SplashScreen-Image" value="TitleScreen.png" />
<attribute name="Class-Path" value="${resources} ${classpath}" />
</manifest>

<zipfileset dir="${build.dir}" />
<zipfileset dir="${resources}" prefix="resources" />

<fileset file="${resources}/icons/misc_icons/TitleScreen.png" />
</jar>

I can't seem to find the resources inside my JAR. Any suggestions/
tips?

Look at the structure of the jar (jar tvf command can be used).

If the path inside the jar is:

resources/icons/misc_icons/TitleScreen.png

then:

getClass().getClassLoader().getResource("resources/icons/misc_icons/TitleScreen.png")

should read it (or .getResourceAsStream if you prefer that).

Arne