JNI Hello World Unsatisfied Link Error

Question

This is my first attempt at JNI. My ultimate goal is to get all tasks currently running on a machine, but need to get even a simple example running. I keep getting this erro

Answer 1

If you change the location (package) of your native function declaration from the java side without updating the h file, and the signature of the method in the c++ side, It won't resolve to the method and will throw unsatisfied..

package x;
public class A {
    private native void print();
    ...
}

moved to:

package x.y;
public class A {
    private native void print();
    ...
}

This will require regeneration of the H file (to something like Java_x_y_A_print ).

Note you can change those signatures manually but I won't recommend