How to pass command-line arguments to IntelliJ itself, to alter behavior of IDE (not my own app within IDE)?
(By the way, an update: Metal is used by default on Apple platforms in Java 19+.)
I want to try using the new Metal-based rendering pipeline on macOS for Java 17, as explained in JEP 382: New macOS Rendering Pipeline. The new feature is not enabled by default. To switch from the default (OpenGL) to the new feature (Metal), one must supply the JVM with command-line arguments upon launch:
-Dsun.java2d.metal=true
I would like try running IntelliJ under Metal rather than OpenGL. So I need to convince IntelliJ to (a) Use Java 17, and (b) pass that argument to the JVM driving its own operations.
I understand that IntelliJ runs on its own internally-bundled JVM rather than the JVM installed on my Mac. So:
- How do I know the version of the JVM being used by IntelliJ?
- Can I point IntelliJ towards another JVM for its own operations, for a later version of 17 (understanding that I am operating IntelliJ in an untested and unsupported environment)?
- How do I pass a command-line argument to that JVM when IntelliJ is launching?
I am using IntelliJ IDEA 2021.2.2 (Ultimate Edition) on macOS Big Sur on MacBook Pro with Apple Silicon (M1 chip).
I am not asking about how to pass command-line arguments to an app being developed within IntelliJ. So I am not asking about how to use the Run/Debug Configurations feature of IntelliJ. That topic has been asked and answered many times already on Stack Overflow.
How do I know the version of the JVM being used by IntelliJ?
You can find that in the 'about' dialog:
Can I point IntelliJ towards another JVM for its own operations, for a later version of 17 (understanding that I am operating IntelliJ in an untested and unsupported environment)?
Technically you can, but it might cause problems in your IDE I think? There's a warning in their documentation, see Change the boot Java runtime of the IDE to switch to a custom JDK.
How do I pass a command-line argument to that JVM when IntelliJ is launching?
Once your IDE is running, go to Help > Edit Custom VM options, see their Advanced configuration page.
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