TRANSPARENT window
import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.layout.VBox; import javafx.scene.text.Font; import javafx.scene.text.Text; import javafx.stage.Stage; import javafx.stage.StageStyle; public class Main extends Application { @Override public void start(Stage stage) { stage.initStyle(StageStyle.TRANSPARENT); Text text = new Text("!"); text.setFont(new Font(40)); VBox box = new VBox(); box.getChildren().add(text); final Scene scene = new Scene(box,300, 250); scene.setFill(null); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(args); } }