this post was submitted on 19 Apr 2025
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How to use Java in Flatpak VSCodium [TUTORIAL] (lemmy.ml)
submitted 2 days ago by serpent0763@lemmy.ml to c/linux@lemmy.ml
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After hours of trying understand how to set up VSCodium with Java extension, i found a solution so here it is, idiotproof (i hope) tutorial for future me and others like me ;)

Flatpak VSCodium with java extension

Via Terminal

  1. Install VSCodium:
flatpak install com.vscodium.codium
  1. Install "Extension Pack for Java" extension for VSCodium:
flatpak run com.vscodium.codium --install-extension vscjava.vscode-java-pack
  1. Install flatpak openjdk extension. (In this case openjdk21):
flatpak install flathub org.freedesktop.Sdk.Extension.openjdk21
  1. Add two new environment to use flatpak openjdk extension in VSCodium:
flatpak override --user --env=JAVA_HOME=/usr/lib/sdk/openjdk21 com.vscodium.codium && flatpak override --user --env=PATH=/usr/lib/sdk/openjdk21/bin:/app/bin:/usr/bin com.vscodium.codium
  1. Restart VSCodium:
flatpak kill com.vscodium.codium && flatpak run com.vscodium.codium
  1. Done.

Via Graphical interface

  1. Install "VSCodium":
    1. Go to app store and search for "VSCodium".
    2. Make sure it's flatpak versionn.
    3. Click Install button and after downloading open the app.
  2. Install "Extension Pack for Java" extension in VSCodium:
    1. Go to Extensions pannel (on the left).
    2. Search for "Extension Pack for Java".
    3. Click Install button.
    4. Close "VSCodium".
  3. Install flatpak openjdk extension. (In this case openjdk21):
    1. Search for "Terminal" app and open it.
    2. Paste command below:
flatpak install flathub org.freedesktop.Sdk.Extension.openjdk21

3. Click `Enter`.
4. Close "Terminal".
  1. Install "Flatseal":
    1. Go to app store and search for "Flatseal".
    2. Click Install button and after downloading open the app.
  2. Allow VSCodium to use flatpak openjdk extension:
    1. Search for "VSCodium" in Flatseal.
    2. Go to Environment.
    3. Click + button (to the right from Variables) and paste:
PATH=/usr/lib/sdk/openjdk21/bin:/app/bin:/usr/bin

4. Click `+` once again and paste:

JAVA_HOME=/usr/lib/sdk/openjdk21
  1. Restart VSCodium

PS

There is formatting issue with markdown but it's on lemmy side i think

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[–] OmegaLemmy@discuss.online 1 points 2 days ago

probably the actual sane solution btw