FlowPane.getPrefWrapLength() has the following syntax.
public final double getPrefWrapLength()
In the following code shows how to use FlowPane.getPrefWrapLength() method.
//w ww.j av a 2 s . c o m import javafx.application.Application; import javafx.geometry.Orientation; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.FlowPane; import javafx.stage.Stage; import javax.swing.GroupLayout.Alignment; public class Main extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage primaryStage) { FlowPane flowPane = new FlowPane(Orientation.HORIZONTAL,20,20); flowPane.setPrefWrapLength(210); Button btn = new Button(); for(int i=0; i<8; i++){ btn = new Button("Button"); btn.setPrefSize(100, 50); flowPane.getChildren().add(btn); } System.out.println(flowPane.getPrefWrapLength()); Scene scene = new Scene(flowPane); primaryStage.setScene(scene); primaryStage.show(); } }