result.addFocusListener( new  FocusAdapter()
            {
                 public   void  focusGained(FocusEvent e) {
                    JFormattedTextField textField = (JFormattedTextField)e.getSource();
                    textField.selectAll();

                    
                }

            });

 private   void  bruttoToNetto(){
         if (lcbPurchaseType.getSelectedItem().toString().equals("§ 25"))
        {
            
            txtPriceNetto.setValue(txtPriceBrutto.getValue());
        }
    }

textField.commitEdit();