how to get java list on rust

[popeye2022]

let elem = env.get_object_array_element(&_list_params, i).expect("msg"); let witness_object = env.get_field(&elem, "name", "J").expect("witness field not found");
java will crash ,this is error log

Internal exceptions (2 events):
Event: 0.201 Thread 0x00007fae26809000 Exception <a 'java/lang/NoSuchMethodError': Method sun.misc.Unsafe.defineClass(Ljava/lang/String;[BII)Ljava/lang/Class; name or signature does not match> (0x000000076ab07ce0) thrown at [/System/Volumes/Data/jenkins/workspace/8-2-build-macosx-x64/jdk8u361/
Event: 0.201 Thread 0x00007fae26809000 Exception <a 'java/lang/NoSuchMethodError': Method sun.misc.Unsafe.prefetchRead(Ljava/lang/Object;J)V name or signature does not match> (0x000000076ab07fc8) thrown at [/System/Volumes/Data/jenkins/workspace/8-2-build-macosx-x64/jdk8u361/3183/hotspot/src/s

[argv-minus-one]

If _list_params is a reference to a java.util.List rather than a Java array, then yes, this is incorrect. Use jni::objects::JList to access the contents of a java.util.List.

[rib]

Going to close this, while guessing that get_object_array_element wasn't being passed a JObjectArray - judging by the name of the variable and exception.

I guess this may have also been tested with a version of jni -rs before #400 landed which improved the type safety of this API.

Please re-open if can provide more details.