ObjectContainer db = Db4o.openFile(DB4OFILENAME);
        try {
            ObjectSet result = db.queryByExample(new Employee(this.txtName.getText(),this.txtDesignation.getText(),
                        this.txtDepartment.getText(),this.txtAddress.getText(),
                        this.txtMailid.getText()));
            Employee found = (Employee) result.next();
            //deleting the Employee 'found' object in the database
            db.delete(found);
            System.out.println("Deleted " + found);

        } finally {
            db.close();
        }