!759

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

public class main extends Application {
  p {
    fixContextClassLoader();
    launch();
  }

  public void start(Stage stage) {
    SwingNode swingNode = new SwingNode();

    createSwingContent(swingNode);

    StackPane pane = new StackPane();
    pane.getChildren().add(swingNode);

    stage.setTitle("Swing in JavaFX");
    stage.setScene(new Scene(pane, 250, 150));
    stage.show();
  }
  
  void createSwingContent(final SwingNode swingNode) {
    awt {
      swingNode.setContent(new JButton("Click me!"));
    }
  }
}

Began life as a copy of #1003698