Final Exam JavaFX PDF

14.3.1 **How do you define a JavaFX main class?** -You define a JavaFX main class by extending the Application class. **What is the signature of the start method?** -public void start(Stage primaryStage) **What is a stage?** -A stage is a window that holds the scene. **What is a primary stage...

14.3.1 **How do you define a JavaFX main class?** -You define a JavaFX main class by extending the Application class. **What is the signature of the start method?** -public void start(Stage primaryStage) **What is a stage?** -A stage is a window that holds the scene. **What is a primary stage?** -Main window **Is a primary stage automatically created?** -Yes **How do you display a stage?** -stage.show(); **Can you prevent the user from resizing the stage?** -stage.setResizable(false); **Can you replace Application.launch(args) by launch(args) in line 22 in Listing 14.1?** 14.4.2 **What is a pane?** -A pane is used to hold and organize nodes **What is a node?** -A node is a visual component that can be displayed **How do you place a node in a pane?** -pane.getChildren().add(node); **Can you directly place a Shape or an ImageView into a Scene?** -No **Can you directly place a Control or a Pane into a Scene?** -Yes using new Scene(Parent), parent being the superclass for control and pane 14.4.3 **How do you create a Circle?** Circle circle = new Circle(); **How do you set its center location and radius?** circle.setCenterX, circle.setCenterY, and circle.setRadius() **How do you set its stroke color and fill color?** circle.setStroke(color), circle.setFill(color) 14.5.1 **What is a binding property?** -Property that binds with a source object **What interface defines a binding property?** if it's an instance of Property **What interface defines a source object?** if it's an instance of ObservableValue **What are the binding object types for int, long, float, double, and boolean?** -IntegerProperty, LongProperty, DoubleProperty, and BooleanProperty **Are Integer and Double binding properties?** No **Can Integer and Double be used as source objects in a binding?** No 14.5.2 **For a binding property named age of the IntegerProperty type, what is its value getter method, value setter method, and property getter method?** -getter method: public int getAge() -settler method: public void setAge(int age) -property getter method: public IntegerProperty ageProperty() 14.5.3 **Can you create an object of IntegerProperty using new IntegerProperty(3)? If not, what is the correct way to create it?** -No. IntegerProperty is an abstract class. You have to use new SimpleIntegerProperty(4) to create an instance of IntegerProperty. -14.5.4 **What is a unidirectional binding and what is bidirectional binding?** -A unidirectional binding binds a target with a source. A bidirectional binding binds two objects together. **Are all binding properties capable of bidirectional binding?** -Not all binding properties can be bidirectional. **Write a statement to bind property d1 with property d2 bidirectionally.** -d1.bindBidirectional(d2) 14.6.1 **How do you set a style of a node with border color red? Modify the code to set the text color for the button to red.** -node.setStyle(\"-fx-border: red\"); -text.setStyle(\"-fx-fill: red\"); 14.6.2 **Can you rotate a pane, a text, or a button? Modify the code to rotate the button 15 degrees counterclockwise?** -Yes. button.setRotate(-15); **How do you test if a point is inside a node?** -node.contains(x, y); **How do you scale up or down a node?** -node.setScaleX(2.0); -node.setScaleX(0.2); 14.7.1 **How do you create a color?** -You can use the Color constructor or static methods in the Color class to create Color objects. **What is wrong about creating a Color using new Color(1.2, 2.3, 3.5, 4)?** -new Color(1.2, 2.3, 3.5, 4) is wrong because the parameter values must be between 0 and 1. **Which of two colors is darker, new Color(0, 0, 0, 1) or new Color(1, 1, 1, 1)?** new Color(0, 0, 0, 1) is darker than new Color(1, 1, 1, 1). **Does invoking c.darker() change the color value in c?** -Invoking c.darker() returns a new Color. Color is immutable. 14.7.2 **How do you create a Color object with a random color?** -new Color(Math.random(), Math.random(), Math.random(), 1) 14.7.3 **How do you set a circle object c with blue fill color using the setFill method and using the setStyle method?** -c.setFill(Color.BLUE) -c.setStyle(\"-fx-fill: blue\") 14.8.1 **How do you create a Font object with font name Courier, size 20, and weight bold?** -new Font(\"Courier\", Weight.BOLD, 20) 14.8.2 **How do you find all available fonts on your system?** Font.getFontNames()