Add JComboBoxby dragging it by frame or panel. So it will be added OtherComponentsin the Navigator View

Add all the content you want to add by double-clicking the drop-down name from Navaigator View
Then right click on JTableand select TableContents

In the dialog box, select ColumnsTab (1) and select the column (2) to which you want to add combobox.
[Ref screenshot (3)]
Custom Code (4)
(5)
new DefaultCellEditor(jComboBox1)//jComboBox1 is the variable name of combobox

"" , import javax.swing.DefaultCellEditor; Ctrl+Shift+I, .
2,
