JTable custom cell renderer focus problem

Question

I have a table like this. The second column uses a JTextField renderer and the third column uses a JPasswordField based renderer and editor.

Answer 1

Tell the table to automatically commit when losing focus:

table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);

Answer 2

So your problem is, that you are still editing the cell. So you have to stop the editing and then the cell will be changed.

At your button you can get the cell who is being edited with
TableCellEditor cellEditor = table.getCellEditor();
then you can stop the editing with
if(cellEditor!=null){
cellEditor.stopCellEditing();
}
and then you can save the value