Any way to run Java GUIs in a Codespace?

[gigamonkey]

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I teach high school computer science and have been using Codespaces for my class where we use Javascript. It's been fantastic for that! Next year I may be teaching a Java course and I'd really love to use Codespaces for that too. However the one thing that I haven't been able to figure out how to do is run a Java GUI (e.g. Swing-based) program in a Codespace. I'd sure hate to make my kids use ReplIt just for that one feature but there are things where it makes sense for them to write GUIs.

[osortega]

Hello @gigamonkey 👋
I'm glad to hear that and thanks for sharing!

This is a really good example on working with GUI applications within VS Code.
All of the instructions there should be able to run within a codespace, the only extra thing that you would need to setup is a way to forward the actual graphical application.
For that I would suggest to use X11 which would allow the remote container to interact with the local display. More information here

Hope this helps!

[ricardo-qm]

I have the same problem and would like to try X11 forwarding as a solution. I have some questions about how to connect to the codespaces via SSH from Windows to be able to implement this solution:

• Which server to indicate?
• Which username and password to use?
• Is the X11 client in Codespaces enabled to connect to the X11 server installeed on Windows?

Since the solutions I find for this indicate that these requirements are required : (https://kb.iu.edu/d/bdnt)

[gigamonkey]

So the simplest solutions turns out to be using the desktop-lite feature in Codespaces

https://github.com/devcontainers/features/tree/main/src/desktop-lite

Basically adding a line to the .devcontainer/devcontainer.json file in my students' repos does the trick, giving me an in browser desktop where GUI apps can run. I guess that's probably X11 forwarding of some sort under the covers but I don't have to install an X11 Server anywhere.

[ricardo-qm]

Thanks, I will try ...

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[lynguyen11]

I made a tutorial to get Java Swing with Graphics working for my students and other teachers. I hope this helps!
https://apps.mvhs.io/resources/codespaces/

[ricardo-qm]

This is the best solution to this problem. I never could run Java Swing with Graphics with Codespaces until this tutorial.

Thanks @lynguyen11

[lynguyen11]

Wonderful! Glad to see it is working for others.

[ricardo-qm]

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[ricardo-qm]

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