Question

I’m creating a simple project using hibernate. I know how to display records on JTable as well as JList but I don’t know how can I display records from the JComboBox. Anyway here are my code and guide me on displaying database record to the JComboBox?

I don’t have any error or anything but it only show one record and that is the last record I know it is on the loop, but can’t still figure out how to display all record. So here are my code.

Variables:

private Object[] loadName;

Methods on Loading and retrieving data:

public Object[] LoadSupplier(){
    b = a.openSession();
    b.beginTransaction();
    Query query = b.createQuery("FROM Supplier");
    @SuppressWarnings("unchecked")
    ArrayList<Supplier> load = (ArrayList<Supplier>) query.list();
    b.getTransaction().commit();
    b.close();
    for(Supplier supply : load){
        loadName = new Object[]{supply.getSupplierName()};
    }
    return loadName;
}

And for showing it to the database:

comboCategory = new JComboBox(LoadSupplier());

What I did is I call the method directly by putting it as the JComboBox value 🙂
Tell me if I’m doing it right. And what is the best way on achieving the desired output?

Answer 1

You’re re-assigning the loadName variable each time the for-loop iterates, and so you shouldn’t be surprised that none of the previous data is saved. Why not instead create a DefaultComboBoxModel<E> object before the for loop, and then add to the model inside of the loop with each iteration?