node.addEventFilter (, new EventHandler(){ 
public void handle(Event-Type){ 
//Actual logic 
}); 

package application;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyEvent;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class JavaFX_EventFilter extends Application{

@Override
public void start(Stage primaryStage) throws Exception {
// TODO Auto-generated method stub

//Adding Labels and TextFileds to the scene 
Label l1 = new Label("Press Any Key ");
Label l2 = new Label("Filtering Event ");

l1.setTranslateX(100);
l1.setTranslateY(100);

l2.setTranslateX(100);
l2.setTranslateY(150);

TextField tf1 = new TextField();
TextField tf2 = new TextField();

tf1.setTranslateX(250);
tf1.setTranslateY(100);
tf2.setTranslateX(250);
tf2.setTranslateY(150);


//Creating EventHandler Object 
EventHandler filter = new EventHandler() {
@Override
public void handle(KeyEvent event) {
// TODO Auto-generated method stub
tf2.setText("Event : "+event.getEventType());
tf1.setText(event.getText());
event.consume();
}
};

//Registering Event Filter for the event generated on text field 
tf1.addEventFilter(KeyEvent.ANY,filter );

//Setting Group and Scene 
Group root = new Group();
root.getChildren().addAll(l1,l2,tf1,tf2);
Scene scene = new Scene(root,500,300,Color.WHEAT);
primaryStage.setScene(scene);
primaryStage.setTitle("Adding Event Filter");
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}

}

node.removeEventFilter(, filter);