How do you define a JavaFX main class? What is the signature of the start method? What is...

How do you define a JavaFX main class? What is the signature of the start method? What is a stage? What is a primary stage? Is a primary stage automatically created? How do you display a stage? Can you prevent the user from resizing the stage? Can you replace Application.launch(args) by launch(args) in line 22 in Listing 1?

LISTING 1 MyJavaFX.java

1 import javafx.application.Application;
2 import javafx.scene.Scene;
3 import javafx.scene.control.Button;
4 import javafx.stage.Stage;
5
6 public class MyJavaFX extends Application {
7 @Override // Override the start method in the Application class
8 public void start(Stage primaryStage) {
9 // Create a scene and place a button in the scene
10 Button btOK = new Button("OK");
11 Scene scene = new Scene(btOK, 200, 250);
12 primaryStage.setTitle("MyJavaFX"); // Set the stage title
13 primaryStage.setScene(scene); // Place the scene in the stage
14 primaryStage.show(); // Display the stage
15 }
16
17 /**
18 * The main method is only needed for the IDE with limited
19 * JavaFX support. Not needed for running from the command line.
20 */
21 public static void main(String[] args) {
22 Application.launch(args);
23 }
24 }