JavaFX KeyCode check enter key

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.text.Text;
import javafx.scene.input.KeyCode;

public class Main extends Application {
  @Override/*from  w  w  w. j a  va2  s.co  m*/
  public void start(Stage primaryStage) {
    final double WIDTH = 500.0;
    final double HEIGHT = 500.0;

    Pane pane = new Pane();

    pane.setOnKeyPressed(e -> {
       pane.getChildren().clear();
      if (e.getCode() == KeyCode.ENTER) {
        Text text = new Text(WIDTH / 4, HEIGHT / 2, "enter");
        pane.getChildren().add(text);
      } else {
         Text text = new Text(WIDTH / 4, HEIGHT / 2, e.getCode().toString());
         pane.getChildren().add(text);
      }
    });

    Scene scene = new Scene(pane, WIDTH, HEIGHT);
    primaryStage.setTitle("java2s.com");
    primaryStage.setScene(scene);
    primaryStage.show();

    pane.requestFocus();
  }

  public static void main(String[] args) {
    launch(args);
  }
}

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class Main extends Application {
   final double KILOMETERS_PER_MILE = 1.602307322544464;
   protected TextField tfMile = new TextField();
   protected TextField tfKilometer = new TextField();

   @Override/*from   w ww  . j a v  a 2 s  . c o  m*/
   public void start(Stage primaryStage) {
      // Set text fields alignment
      tfMile.setAlignment(Pos.BOTTOM_RIGHT);
      tfKilometer.setAlignment(Pos.BOTTOM_RIGHT);

      // Create a gridpane and place nodes into it
      GridPane pane = new GridPane();
      pane.setAlignment(Pos.CENTER);
      pane.add(new Label("Mile"), 0, 0);
      pane.add(tfMile, 1, 0);
      pane.add(new Label("Kilometer"), 0, 1);
      pane.add(tfKilometer, 1, 1);

      // Create and register the handlers
      tfMile.setOnKeyPressed(e -> {
         if (e.getCode() == KeyCode.ENTER && tfMile.getText().length() > 0) {
            double miles = Double.parseDouble(tfMile.getText());
            tfKilometer.setText(String.valueOf(miles * KILOMETERS_PER_MILE));
         }
      });

      tfKilometer.setOnKeyPressed(e -> {
         if (e.getCode() == KeyCode.ENTER && tfKilometer.getText().length() > 0) {
            double kilometers = Double.parseDouble(tfKilometer.getText());
            tfMile.setText(String.valueOf(kilometers / KILOMETERS_PER_MILE));
         }
      });

      // Create a scene and place it in the stage
      Scene scene = new Scene(pane, 250, 60);
      primaryStage.setTitle("java2s.com");
      primaryStage.setScene(scene);
      primaryStage.show();
   }
}