private void addListener() { typeComboBox.addActionListener(e -> updateAiPlayerName()); civilisationComboBox.addActionListener(e -> updateAiPlayerName()); slotComboBox.addActionListener(e -> { if (slotListener != null) { slotListener.slotHasChanged(oldSlotValue, getSlot()); } oldSlotValue = getSlot(); }); readyButton.addActionListener(e -> { setReady(!isReady()); if (gameToBeInformedAboutReady != null) { gameToBeInformedAboutReady.setReady(isReady()); } }); }