JavaFX TextField handle key pressed event

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

public class Main extends Application {
  protected TextField tfDecimal = new TextField();
  protected TextField tfHex = new TextField();
  protected TextField tfBinary = new TextField();

  @Override//from  ww  w  .j a  va  2  s  .c  o  m
  public void start(Stage primaryStage) {
    // Set text field preferences
    tfDecimal.setAlignment(Pos.BOTTOM_RIGHT);
    tfHex.setAlignment(Pos.BOTTOM_RIGHT);
    tfBinary.setAlignment(Pos.BOTTOM_RIGHT);

    // Create a grid pane and add nodes to it
    GridPane pane = new GridPane();
    pane.setAlignment(Pos.CENTER);
    pane.setHgap(10);
    pane.setVgap(2);
    pane.add(new Label("Decimal"), 0, 0);
    pane.add(tfDecimal, 1, 0);
    pane.add(new Label("Hex"), 0, 1);
    pane.add(tfHex, 1, 1);
    pane.add(new Label("Binary"), 0, 2);
    pane.add(tfBinary, 1, 2);

    // Create and register handlers
    tfDecimal.setOnKeyPressed(e -> {
      if (e.getCode() == KeyCode.ENTER) {
        tfHex.setText(Integer.toHexString(
          Integer.parseInt(tfDecimal.getText())));

        tfBinary.setText(Integer.toBinaryString(
          Integer.parseInt(tfDecimal.getText())));
      }
    });

    tfHex.setOnKeyPressed(e -> {
      if (e.getCode() == KeyCode.ENTER) {
        tfDecimal.setText(String.valueOf(
          Integer.parseInt(tfHex.getText(), 16)));

        tfBinary.setText(Integer.toBinaryString(
          Integer.parseInt(tfHex.getText(), 16)));
      }
    });

    tfBinary.setOnKeyPressed(e -> {
      if (e.getCode() == KeyCode.ENTER) {
        tfDecimal.setText(String.valueOf(
          Integer.parseInt(tfBinary.getText(), 2)));

        tfHex.setText(Integer.toHexString(
          Integer.parseInt(tfBinary.getText(), 2)));
      }
    });

    // Create a scene and place it in the stage
    Scene scene = new Scene(pane, 250, 100);
    primaryStage.setTitle("java2s.com");
    primaryStage.setScene(scene);
    primaryStage.show();
  }
}