import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**
 *
 * @author zoranpavlovic.blogspot.com
 */
public class CreateDialog extends Application {
    /**
     * @param args
     *            the command line arguments
     */
    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(final Stage primaryStage) {
        primaryStage.setTitle("Dialog");

        StackPane sp = new StackPane();
        Button btnOpen = new Button("Open Dialog");
        sp.getChildren().add(btnOpen);

        // Add action to open a new dialog
        btnOpen.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent event) {
                // Creating a new Stage and showing it
                Stage stage = new Stage();
                Scene page2 = new Scene(new Group(new Text(20, 20,"This is a new dialog!")));
                stage.setScene(page2);
                stage.show();
            }
        });

        // Adding StackPane to the scene
        Scene scene = new Scene(sp, 300, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}