simple code to show a dialog using JFXDialog of @jfoenix

JFXDialog.java

  private void showJDialog() {

        JFXDialogLayout dialogContent = new JFXDialogLayout();
        dialogContent.setHeading(new Text("Hello" == null ? "good" : "good" + "\n" + "Hello"));
        dialogContent.setBody(new Text("Body"));
        JFXButton close = new JFXButton("Close");
        dialogContent.setActions(close);
        JFXDialog dialog = new JFXDialog((StackPane) loginstage.getScene().getRoot(), dialogContent, JFXDialog.DialogTransition.CENTER);
        close.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent __) {
                dialog.close();
            }
        });
        dialog.show();

    }