Settings › Editor › Inspections › Java gets "Serializable class without 'serialVersionUID'", off by default. When it is on, jdtls's compiler reports classes that implement Serializable without a serialVersionUID field, and Alt+Enter on the class name offers "Add default serial version ID" and "Add generated serial version ID". The severity chosen for the inspection sets ECJ's level: error, warning, or info for the weaker levels. - Built-in inspections can now be off by default (`defaultEnabled`). The settings tree, group toggles and profile filtering respect this, and an override is stored only when it differs from the default. - `InspectionSettings::active` resolves the profile in effect in the backend. `configure_java_compiler` writes the matching `missingSerialVersion` level into a compiler-defaults file named after the variant, so a change gives jdtls a new configuration and restarts it. - Saving inspection settings now reconfigures language servers, as code style settings already did. Fixes #1199
The IDE you know, rebuilt in Rust.
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OpenIDEA brings the IntelliJ IDEA way of working — its keymap, its tool windows, its search-everything habits — to a native app with a Rust core.
Editor, code insight, debugger, Git, terminal, database and HTTP clients, for 60+ languages. Builds for macOS, Windows and Linux.
Benchmark
Opening freqtrade (Python, ~770 files) with warm caches, median of 5 runs:
| OpenIDEA | IntelliJ IDEA 2026.2.3 | |
|---|---|---|
| Window with the project | 0.9 s | 3.1 s |
| Ready (CPU settled) | 1.1 s | 13.2 s |
| Memory (USS, all processes) | 169 MB | 2011 MB |
| CPU time until ready | 2.4 s | 47.9 s |
| Idle CPU | 4 % of a core | 7 % of a core |
| Quit | 0.3 s | 5.9 s |
A release build of OpenIDEA from main and IDEA with default settings and plugins, on
Windows 11, 32-core AMD, 62 GB RAM.
IDEA analyses Python more deeply, so "ready" doesn't mean the same work on
both sides. Both are measured from the outside, the same way: see
perf/compare to run it on your machine and projects.
Plugins
Plugins add actions, completion, quick fixes, tool windows, custom editors, themes, file icons and languages. They run as sandboxed WebAssembly components; themes, icon themes and languages need no code at all.
Install them from Settings › Plugins, or start your own with
openidea-plugin new — see Writing OpenIDEA plugins and
the official plugins. The plugin API is still a preview.
License
Apache 2.0. Bundled third-party assets are listed in THIRD_PARTY_LICENSES.md.
Not affiliated with JetBrains. IntelliJ IDEA is a trademark of JetBrains s.r.o.