Author Question: Analyze the following code:import javafx.application.Application;import javafx.scene.Scene;import ... (Read 135 times)

cool · **on:** May 6, 2020

Question 1

To place two nodes node1 and node2 in a HBox p, use ________.
◦ p.add(node1, node2);
◦ p.getChildren().addAll(node1, node2);
◦ p.getChildren().add(node1, node2);
◦ p.addAll(node1, node2);

Question 2

Analyze the following code:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.layout.HBox;
import javafx.scene.shape.Circle;

public class Test extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {

HBox pane = new HBox(5);

Circle circle = new Circle(50, 200, 200);

pane.getChildren().addAll(circle);

circle.setCenterX(100);

circle.setCenterY(100);

circle.setRadius(50);

pane.getChildren().addAll(circle);

// Create a scene and place it in the stage

Scene scene = new Scene(pane);

primaryStage.setTitle("Test"); // Set the stage title

primaryStage.setScene(scene); // Place the scene in the stage

primaryStage.show(); // Display the stage

}

/**
* The main method is only needed for the IDE with limited
* JavaFX support. Not needed for running from the command line.
*/
public static void main(String[] args) {

launch(args);

}
}

◦ The program has a runtime error since the circle is added to a pane twice.
◦ The program runs fine and displays two circles.
◦ The program has a compile error since the circle is added to a pane twice.
◦ The program runs fine and displays one circle.

Hdosisshsbshs · **Reply #1 on:** May 6, 2020

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