Any characters being produced by pressing Alt-Gr and a letter key (namely '@', '€' and 'µ') are not entered in a JTextComponent-derived Swing text field (like JTextComponent, JPasswordField, JTextArea, ...).


Code reproducing the behaviour:

{code}
package de.shd.basis.javafxui;

import javax.swing.JTextField;
import javax.swing.SwingUtilities;

import javafx.application.Application;
import javafx.embed.swing.SwingNode;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class AltGrCharsInSwingNodeProblemReproducer extends Application
{
   public static void main(String[] args)
   {
      launch(args);
   }

   @Override
   public void start(Stage stage)
   {
      final SwingNode swingNode = new SwingNode();
      createAndSetSwingContent(swingNode);
      StackPane pane = new StackPane();
      pane.getChildren().add(swingNode);
      stage.setScene(new Scene(pane, 100, 50));
      stage.show();
   }

   private void createAndSetSwingContent(final SwingNode swingNode)
   {
      SwingUtilities.invokeLater(
            () -> {
               JTextField text = new JTextField();
               swingNode.setContent(text);
            }
      );
   }
}
{code}