Netbeans Swing Master细节示例表格删除不起作用

Question

I'm using NB 7.4, JavaDb , jdk 7.

I tried to work on this example : http://simsam7.blogspot.in/2013/06/quick-crud-application-on-netbeans-73.html

In CRUD, CRU works good, but delete not working,and its not throwing any error also.

My Code for delete button.

 int[] selected = masterTable.getSelectedRows();
        List<com.fz.PurchaseOrder> toRemove = new ArrayList<com.fz.PurchaseOrder>(selected.length);
        for (int idx = 0; idx < selected.length; idx++) {
            com.fz.PurchaseOrder p = list.get(masterTable.convertRowIndexToModel(selected[idx]));
            toRemove.add(p);
            entityManager.remove(p);
        }
        list.removeAll(toRemove);

I done debug, and i think error at entityManager.remove(p).

INFO : Output GUI - The row in table removes/delete good, but when i refresh it shows again.

Answer 1

I solved my problem by this code. It works, but i'm not sure, is it the right way?

int[] selected = masterTable.getSelectedRows();
        List<Products> toRemove = new ArrayList<Products>(selected.length);
        for (int idx = 0; idx < selected.length; idx++) {
            Products p = list.get(masterTable.convertRowIndexToModel(selected[idx]));
            toRemove.add(p);
            entityManager.remove(p);
        }
        try {
            entityManager.getTransaction().commit();
            entityManager.getTransaction().begin();
        } catch (Exception e) {
        }
        list.removeAll(toRemove);

If there is a better way, please let me know.