Hello,
Just want to mention that I’ve just published on GitHub an eclipse plug-in that builds Java desktop application projects into AppImage packages.
The project link is: https://github.com/brotenet/ide.export.appimage
At this point there is no Eclipse update-site for it available since this is part of a bigger project that I’m working on where I will be releasing an update-site once I’m done with all the plug-ins.
You can download the binary export using the link below -or- checkout the project source and build it in Eclipse RCP edition.
Download link: https://github.com/brotenet/ide.export.appimage/blob/master/readme_resources/ide.export.appimage_1.0.0.201805151429.jar
If you decide to try it then please let me know what you think, and if you found any bugs or things that I should be adding to it.
Cheers! 
2 Likes
Hi, thank you very much for letting us know about this exciting project. What is the most straightforward way to test it?
Hello Probono,
Have a look at the steps in the attached image.
Let me know if you need extra help with it.
Hello again Probono,
I have quickly build a small project to help with the testing.
Please follow the steps in the attached images using the project archive export provided on the following link:
https://github.com/brotenet/ide.export.appimage/blob/master/readme_resources/swt_appimage_test.tar.gz
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Importing the test project
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Running the test project
Please let me know if you need extra help with it.
Note: Have in mind that this is still in Alpha and I’m still finding and fixing bugs.
Hi again… 
Just fixed a major issue with the manifest file.
If you tested the plug-in and failed it’s because it was not generating the MANIFEST.MF file correctly.
I have updated all the links in my previous posts to reflect the new plug-in binary .jar as well as added the link for the test project
Very cool. Thank you @brotenet. This will certainly help to make more Java applications available as AppImages.