onClick-Snippet

Button

import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.event.Event;

setOnAction(e->calc());

CheckBox

chkbox.selectedProperty().addListener(new ChangeListener() {
   @Override
   public void changed(ObservableValue observable, 
									Boolean oldValue, Boolean newValue) {
      if(newValue){
          // aktion
      }else{
         // aktion  }
      }
});


chk.setOnAction(new EventHandler() {
   @Override
   public void handle(ActionEvent e) {
      aktion();
   }
});

ListView

import javafx.scene.input.MouseEvent;
import javafx.scene.input.MouseButton;


listviewPunkte.setOnMouseClicked(e->listviewOnClick(e));

private void listviewOnClick(MouseEvent e) {
        // MIDDLE   SECONDARY
   if (e.getButton()==MouseButton.PRIMARY && e.getClickCount()==2) {
     editSeletedItem();
   }
}