Java: Difference between revisions

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== VSCode + Language Support for Java (TM) by Red Hat extension ==

Unfortunately the extension makes use of dynamically loaded libraries which nix cannot accomodate out-of-the-box. Fortunately there's a simple solution in the use of [https://github.com/Mic92/nix-ld nix-ld]. Here's a simple flake.nix to get you started (I'll focus on the devShell part for brevity):<syntaxhighlight lang="nix">

Unfortunately the extension contains and uses a version of the JRE which makes use of dynamically loaded libraries, which nix cannot accomodate out-of-the-box. Fortunately there's a simple solution in the use of [https://github.com/Mic92/nix-ld nix-ld]. Here's a simple flake.nix to get you started (I'll focus on the devShell part for brevity):<syntaxhighlight lang="nix">

devShell = pkgs.mkShell {

buildInputs = [

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};

</syntaxhighlight>The important lines are the two lines starting with "NIX_LD...". They will let nix-ld wrap the required, dynamically loaded libraries so that they are found when building the devShell.

Another solution is to use the <code>[https://github.com/redhat-developer/vscode-java?tab=readme-ov-file#supported-vs-code-settings java.jdt.ls.java.home]</code> VSCode setting to point to a nix-built Java 17. For example, using home-manager's settings: <syntaxhighlight lang="nix">

programs.vscode.enable = true;

programs.vscode.extensions = [ pkgs.vscode-extensions.redhat.java ];

programs.vscode.userSettings = {

"java.jdt.ls.java.home" = "${pkgs.jdk17}";

};

</syntaxhighlight>Note that this will still result in the extension downloading its own JRE, it just will not be used.

== Using Oracle JDK instead of Open JDK ==

@@ Line 24: / Line 24: @@
 == VSCode + Language Support for Java (TM) by Red Hat extension ==
-Unfortunately the extension makes use of dynamically loaded libraries which nix cannot accomodate out-of-the-box. Fortunately there's a simple solution in the use of [https://github.com/Mic92/nix-ld nix-ld]. Here's a simple flake.nix to get you started (I'll focus on the devShell part for brevity):<syntaxhighlight lang="nix">
+Unfortunately the extension contains and uses a version of the JRE which makes use of dynamically loaded libraries, which nix cannot accomodate out-of-the-box. Fortunately there's a simple solution in the use of [https://github.com/Mic92/nix-ld nix-ld]. Here's a simple flake.nix to get you started (I'll focus on the devShell part for brevity):<syntaxhighlight lang="nix">
 devShell = pkgs.mkShell {
    buildInputs = [
@@ Line 38: / Line 38: @@
 };
 </syntaxhighlight>The important lines are the two lines starting with "NIX_LD...". They will let nix-ld wrap the required, dynamically loaded libraries so that they are found when building the devShell.
+Another solution is to use the <code>[https://github.com/redhat-developer/vscode-java?tab=readme-ov-file#supported-vs-code-settings java.jdt.ls.java.home]</code> VSCode setting to point to a nix-built Java 17. For example, using home-manager's settings: <syntaxhighlight lang="nix">
+programs.vscode.enable = true;
+programs.vscode.extensions = [ pkgs.vscode-extensions.redhat.java ];
+programs.vscode.userSettings = {
+  "java.jdt.ls.java.home" = "${pkgs.jdk17}";
+};
+</syntaxhighlight>Note that this will still result in the extension downloading its own JRE, it just will not be used.
 == Using Oracle JDK instead of Open JDK ==