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Asked: 2026-05-27T21:01:01+00:00

This link seems to suggest that it just works: (pretty far on the bottom

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This link seems to suggest that “it just works”: (pretty far on the bottom under 7.3 Attaching Native Threads) http://java.sun.com/docs/books/jni/html/invoke.html

I don’t see how that is possible, is the embedded JVM going to start its own threads automatically? Or queue the JNI calls? How else could there be multiple calls to the same virtual machine. which I haven’t instructed to do any threading?

Any way I can imagine that to work is, if the java code will simply be executed in the same calling thread as the c code. Is that correct? That would mean that I don’t have to do any threading in Java.

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  1. Editorial Team

    The jvm does not have to create its own threads, the method calls are executed on the native threads that make them. The AttachCurrentThread and DetachCurrentThread will take care of any necessary jvm internal state management, for example creating java Thread objects wrapping the native threads.

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