Lee Dong Geon
54502e0a17
A Java file outside a Maven / Gradle build ran as `java File.java` (JEP 330), which launches the file's first top-level type on JDK 21 and earlier. A file whose main is in a later class failed with "can't find main(String[]) method in class: Parent", and the gutter Run of a second or nested class's main launched the first class. Such files now compile with the JDK's own `javac -g -d <class dir>` and run `java -cp <class dir> <main class>`; a main in the first class, and compact source files, still use the source launcher. Debug passes the JDWP agent through JDK_JAVA_OPTIONS, which only the java launcher reads. Co-authored-by: ldg030201 <[email protected]>
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
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