Qt Jambi Manifest problem

**stevey** · 14th December 2007, 07:33

I've installed the standard Java edition of Eclipse Europa and Jambi 4.3.3 as well as the Jambi integration for Eclipse.

I clearly have a "main" function defined and when I export to a .jar file I specify the class to be used as an entry point, yet when I try to execute the .jar file it claims that no entry point has been included.

Any faced this issue before?
I'm building against JRE 1.6.0_03.
I know it's probably more of a Java issue, but I wasn't sure if it's because of the Qt integration or what. I've never done Java with Eclipse so I thought I'd ask here.

Thanks.

**marcel** · 14th December 2007, 09:59

Create a META-INF folder in your project and in it create a custom MANIFEST.MF.
You should add in it a main class entry, something like this:

Qt Code:

Switch view

Main-Class: your_main_class_name

Main-Class: your_main_class_name

To copy to clipboard, switch view to plain text mode

Next, when you build the jar, when the wizard asks you for the manifest file, specify the one you just created, from the workspace.

**stevey** · 14th December 2007, 11:35

In the .jar files I've been getting, if I open it with 7zip or whatever, there is a META-INF containing a MANIFEST.MF that has the correct <package.class name> path.

Is this different in some way to doing it explicitly the way you're suggesting?

**marcel** · 14th December 2007, 11:39

Is this <package.class name> the "Class-Path" property or the "Main-Class" property?

**stevey** · 15th December 2007, 04:48

The contents of the MANIFEST.MF file being generated is:

Manifest-Version: 1.0
Main-Class: FirstJambiTest.MainDialog

I've attached my test project.
TIA for any help you can give,

Steve

**marcel** · 15th December 2007, 07:12

OK, the project looks good, both the source and the binaries. Also, the manifest seems to be correct so far.

The only thing that is missing is the "Class-Path" entry in MANIFEST.MF, which should contain the path to the Jambi jar, the complete path, such as: "Class-Path: c:\qtjambi_installdir\qtjambi.jar".

You should try editing the jar after it is created and add this entry.
Also, can you paste here the error you initially got? I don't have Jambi installed.

**stevey** · 15th December 2007, 09:18

The error is "Could not find the main class. Program will exit."

I get the same error even with the Class-Path set as you suggested.

**marcel** · 15th December 2007, 10:39

It doesn't make any sense... I've done this a lot of times(not with jambi, though) and never had any problems.

Can you attach the jar? I'll test it here.

**stevey** · 16th December 2007, 00:02

Here tis.

I'm starting to wonder if it's a general Java thing.
I might try building my Java project against version 1.5 and see what happens.

**stevey** · 16th December 2007, 22:25

Well, it's definitely a Jambi issue. I just created a vanilla Java project which displayed a dialog. After exporting it worked fine by double clicking hte .jar file. The was without including a specific MANIFEST.MF file.

There probably isn't anything WRONG with Jambi, just that I'm missing something.
I'll do a little more reading.

JuanC · 2nd July 2008, 21:14

In Trolltech documents , there are this info :

http://doc.trolltech.com/qtjambi-4.4...e-java-archive

Anyone knows how to pack into a single .jar file , myapplication.jar , qtjambi-4.4.0_01.jar , qtjambi-win32-msvc2005-4.4.0_01.jar , qtjambi-linux32-gcc3.3-4.4.0_01.jar and this .jar file runs?

I tried it several times and no luck.