Search:

JNI stands for Java Native Interface. Its an API that allows you to use native libraries.

The code that you show and the error you posted do not belong together.
Read the error message, it tells you what the problem is:

Is wrong because the variable "queue" is not a known symbol.

One problem I see is the following:

Info[] queue = new Info[100];
...
info.CPUSpeed = ... ;
What do you think is going to happen here?