java - how to add a ".so" library in a Netbins project in ubuntu -

i beginner in netbeans java development. searching solution long time , have found answers here , here too can't make work. have tried run command:

java -djava.library.path=<path/to/the/file.so> 

it gives me menu , did nothing.

please give me detailed guide how add .so library files in netbeans project in ubuntu.