rec.allocate() null pointer exception

[Prometheus]

this is the error i get everytime i compile any of the examples off the jsapi doc. i'm using eclipse and i do have a bit of compilation errors in the packages.

if i run
import javax.speech.;
import javax.speech.recognition.;
import java.io.;
import java.util.;

public class HelloWorld extends ResultAdapter
{
static Recognizer rec;

public static void main(String[] args)
{
    try
    {   
        rec = Central.createRecognizer(null);
        System.out.println("rec = "+rec);
        if(rec != null) System.out.println("desc = "+rec.getEngineModeDesc());

    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
}

}

rec is null everytime. I tried to use cmu.edu.sphinx...Recognizer but then i get an error "can not convert from type Recognizer to Recognizer"