db4o Developer Community

i am trying to run my first program on db4o but got stuck, i have made a package with Util.java, pilot.java and sumit.java

I am getting errorrs while compiling sumit.java and here is the code

[code]

package a;
import java.io.File;
import com.db4o.Db4o;
import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;
import a.Util;

   

     class sumit extends Util{
    public static void main(String args[]){
    ObjectContainer db=Db4o.openFile(Util.DB4OFILENAME);
    try {
        Pilot pilot1 = new Pilot("Michael Schumacher",100);
        db.set(pilot1);
        System.out.println("Stored "+pilot1);



        }
    finally {
    db.close();
        }
}}

[/code] 

i am using java1.5.0_14

any suggestions plzzzz