Java tutorial
import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Tooltip; import javafx.scene.shape.Rectangle; import javafx.stage.Stage; public class Main extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) { Scene scene = new Scene(new Group()); stage.setTitle("Tooltip Sample"); stage.setWidth(300); stage.setHeight(150); Rectangle rect = new Rectangle(0, 0, 100, 100); Tooltip t = new Tooltip("A Square"); Tooltip.install(rect, t); ((Group) scene.getRoot()).getChildren().add(rect); stage.setScene(scene); stage.show(); } }