14.3 How do you define a JavaFX main class? What is the signature of the start m
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14.3 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 14.1 (given below)? LISTING 14.1 MyJavaFX. java 1 import javafx.application.Application; 2 import javafx.scene.Scene; 3 import javafx.scene.control.Button; 4 import javafx.stage.Stage; 6 public class MyJavaFX extends Application extend Application 7 GOverride// Override the start method in the Application class 8 public void start(Stage primaryStage) override start /7 Create a scene and place a button in the scene Button btOK-new ButtonC"OK" Scene scene new Scene (btOK, 200, 250); primaryStage.setTitleC"My JavaFX); 1I Set the stage title primaryStage.setScene(scene) // Place the scene in the stage primaryStage.showO;// Display the stage 9 10 12 13 14 15 16 create a button create a scene set stage title set a scene display stage 18 19 20 The main method is only needed for the IDE with limited JavaFX support. Not needed for running from the command line. 21 public static void main(String[] args) main method launch application Application.1aunch(args); 23 24Explanation / Answer
How do you define a JavaFX main class?
The main class for the JAVAFX main class extends the javafx.application.Application class.The start() method is the primary entry point for all JAVAFX application.It defines the user interface by using the stage and scene
What is the signature of the start method
public void start(Stage primaryStage)
what is a stage
Stage is defined as a window to hold a scene and an application can have multiple stages.
A stage is a window to holding a scene. An application may have multiple stages.
what is a primary stage
Primary stage is the stage which is being created automatically when a JAVAFX program is launched.
How do you display a stage?
To display a stage we need to call the show() method.
Can we prevent the user from resizing the stage?
Yes,we can prevent the user from resizing the stage by calling stage.setResizable(false).
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