Accessing a subpackage in a jar?

Question

Java

There is a package mpjdev.jar.
This package has a natmpjdev subpackage that contains the Intracomm class I need.
I create an instance of the Intracomm class in my class and import the package in the line " import mpjdev.natmpjdev.Intracomm; ". Further, when I try to run my class, Intellij Idea gives me an exception (java.lang.UnsatisfiedLinkError: no nativempjdev in java.library.path), although it didn’t swear before, and itself suggested that I import this package.
How can I still include this subpackage?

Answer 1

So why didn't you look at the description of your exception in the javadoc ?
"Thrown if the Java Virtual Machine cannot find an appropriate native-language definition of a method declared native."
Do you know what kind of jar mpjdev.jar is and what kind of native code can be there?