Again I have stupid questions ...
As, for example, in Aktsessa: there is a combo box, it has its own data source, for example, select for two fields: name and identifier. The name is displayed, the identifier is not, but when you select a value, it ( id ) is stored in a certain field, thus making fk .
How to implement this in JAVA on JComboBox ? I honestly did not find that through DefaultComboBoxModel could transfer two columns to the combobox ...