public class Pilot {
    private String name;
    private int points;

    public Pilot(String name,int points) {
        this.name=name;
        this.points=points;
    }
}

...
db.store(new Pilot("Michael Schumacher",100));
db.store(new Pilot("Rubens Barrichello",99));
...
ObjectSet result1 = db.queryByExample(new Pilot(null,0));
ObjectSet result2 = db.queryByExample(Pilot.class);
ObjectSet result3 = db.queryByExample(new Pilot("Michael Schumacher",0));
ObjectSet result4 = db.queryByExample(new Pilot(null,100));
...