+ if(((Offer) comboBox_o.getSelectedItem()).isBooked()){
+ jLabel5.setText("This offer is already booked.");
+ jButton1.setEnabled(false);
+ }
+ comboBox_o.addItemListener(new ItemListener() {
+ @Override
+ public void itemStateChanged(ItemEvent arg0) {
+ if(((Offer) comboBox_o.getSelectedItem()).isBooked()){
+ jLabel5.setText("This offer is already booked.");
+ jButton1.setEnabled(false);
+ }
+ }
+ });
+ comboBox_o.addItemListener(new ItemListener() {
+ @Override
+ public void itemStateChanged(ItemEvent arg0) {
+ if(!((Offer) comboBox_o.getSelectedItem()).isBooked()){
+ jLabel5.setText("");;
+ jButton1.setEnabled(true);
+ }
+ }
+ });