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Java-Gaming.org > Game Development > Newbie & Debugging Questions > Eclipse Jar problem. It really doesn't make sense.
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  Eclipse Jar problem. It really doesn't make sense.  (Read 381 times)
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Offline SkyAphid

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« on: 2012-01-16 22:41:25 »
Just look at these.



Then,



and then...




Can anyone shed some light?
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Offline ra4king

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« Reply #1 on: 2012-01-16 22:48:22 »
Open the JAR file in some a ZIP tool, preferably 7zip. Can you find edu/bgp/global/Game.class?
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Offline SkyAphid

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« Reply #2 on: 2012-01-16 23:07:09 »


Yeah.
lol. Didn't know I could pop jars open with WinRAR though. Haha.
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Offline ra4king

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« Reply #3 on: 2012-01-16 23:08:05 »
A JAR file is a ZIP file with a renamed extension Wink

Ok now go back to the root, go to the "META-INF" folder and open the MANIFEST.MF file in a text editor.

EDIT: Why is Game.java in there too? O_o
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Offline SkyAphid

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« Reply #4 on: 2012-01-16 23:10:11 »
"Manifest-Version: 1.0
Sealed: true
Main-Class: edu.bgp.global.Game"

Is what it said.
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Offline ra4king

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« Reply #5 on: 2012-01-16 23:11:19 »
Huh, everything is fine with your JAR file. Could you send it to me? I'll try it running it here. If it works for me, then your Java installation is messed up :S
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Offline SkyAphid

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« Reply #6 on: 2012-01-16 23:17:22 »
Sent a PM.
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Offline ra4king

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« Reply #7 on: 2012-01-16 23:21:28 »
I got a "Java Exception has occurred." On the command prompt, it said it couldn't find the Slick classes Tongue

Of course, how could I forget. You have to edit the MANIFEST.MF file properly, follow these directions in the first bullet.
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Offline SkyAphid

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« Reply #8 on: 2012-01-16 23:22:49 »
Thanks man!
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Offline sproingie

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« Reply #9 on: 2012-01-17 00:57:09 »
Quote from: ra4king on 2012-01-16 23:08:05
A JAR file is a ZIP file with a renamed extension Wink

Actually no, META-INF and META-INF/MANIFEST.MF have to be the first and second entries in the TOC or it's not a valid jar file.  Just in case anyone was thinking about using zip and renaming it in order to create a jar file.  For reading though, yeah it's a .zip
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Offline ra4king

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« Reply #10 on: 2012-01-17 01:11:05 »
Created Zip File -> Create META-INF folder -> Create MANIFEST.MF -> add classes -> Rename to .JAR -> double click -> works for me Smiley
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Offline sproingie

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« Reply #11 on: 2012-01-17 01:19:23 »
I swear I read something about the restriction about META-INF in the zip index ... maybe they dropped it in later versions.  The jar utility still guarantees it's the first entry though.
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