Tooltip.setFont(Font value) has the following syntax.
public final void setFont(Font value)
In the following code shows how to use Tooltip.setFont(Font value) method.
import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Tooltip; import javafx.scene.text.Font; import javafx.stage.Stage; // www. ja v a 2 s. co m 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.setWidth(300); stage.setHeight(150); Button button = new Button("Hover Over Me"); Tooltip toolTip = new Tooltip("Tooltip for Button"); toolTip.setFont(Font.font("", 0.5)); System.out.println(toolTip.isWrapText()); button.setTooltip(toolTip); ((Group) scene.getRoot()).getChildren().add(button); stage.setScene(scene); stage.show(); } }