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Migrating a project to modules [message #1855438]

Fri, 14 October 2022 08:54

Julian Ragan

Messages: 5
Registered: July 2020

Junior Member

I thought java modules should have matured by now, so I have decided to try and migrate a testing project to modules. Boy was I wrong.

Is there an Eclipse focused guide to Java modules? Especially the troubleshooting part? When going outside the arbitrary boundaries of that system?

Right now I am stuck at getting to work again with sun.font package. And I can't figure out, how to solve this:

Unable to make private sun.font.Font2D java.awt.Font.getFont2D() accessible: module java.desktop does not "opens java.awt" to module FontEncoder

I have added to run VM arguments:
--add-exports java.desktop/sun.font=ALL-UNNAMED --add-opens java.desktop/java.awt=ALL-UNNAMED

And now I am all out of google results. I am trying to run it with jdk17
(which supposedly still changes behavior of modules system to more strict enforcement).

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Re: Migrating a project to modules [message #1855439 is a reply to message #1855438]

Fri, 14 October 2022 10:01

Jay Arthanareeswaran

Messages: 128
Registered: July 2009

Senior Member

Can you see if the following page provides what you are looking for?

https://help.eclipse.org/latest/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Freference%2Fref-properties-build-path.htm&anchor=module-dependencies

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Re: Migrating a project to modules [message #1855440 is a reply to message #1855439]

Fri, 14 October 2022 10:51

Julian Ragan

Messages: 5
Registered: July 2020

Junior Member

No, it does not. It explains how Eclipse supports java modules, so it assumes I know all about modules already. Also there is nothing about troubleshooting issues common to migrating a project to modules.

What I was looking for was something that would explain to me at the same time java modules and eclipse support for it along with troubleshooting information. But the more I explore the problem, the more it seems that JDK people decided, that if I want to do something, that was possible only through unsupported JDK internals, I absolutely have to write my own library for that, or find another third party library. And they are using java modules to enforce their decision.

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Re: Migrating a project to modules [message #1855443 is a reply to message #1855440]

Fri, 14 October 2022 11:21

Julian Ragan

Messages: 5
Registered: July 2020

Junior Member

I have somehow managed to make it run on java 17.

Just changed the VM arguments to:
--add-opens java.desktop/sun.font=FontEncoder --add-opens java.desktop/java.awt=FontEncoder

Seems I have to be specific about the module, that will be using JDK internals in modules. I really don't get it.

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