14.3 How do you define a JavaFX main class? What is the signature of the start...
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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; 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 public class MyJavaFX extends Application { @Override // Override the start method in the Application class public void start (Stage primaryStage) { // Create a scene and place a button in the scene Button btOK = new Button("OK"); Scene scene = new Scene (btOK, 200, 250); 23 24 } primaryStage.setTitle("MyJavaFX"); // 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) { Application.launch(args); } extend Application override start create a button create scene set stage title set a scene display stage main method launch application 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; 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 public class MyJavaFX extends Application { @Override // Override the start method in the Application class public void start (Stage primaryStage) { // Create a scene and place a button in the scene Button btOK = new Button("OK"); Scene scene = new Scene (btOK, 200, 250); 23 24 } primaryStage.setTitle("MyJavaFX"); // 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) { Application.launch(args); } extend Application override start create a button create scene set stage title set a scene display stage main method launch application
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