QUESTION 31 Using JavaFX, if you want the user to have a drop-down list from whi

Question

QUESTION 31

Using JavaFX, if you want the user to have a drop-down list from which they can select one or more items, use a(n) __________.

ListView

ComboBox

ListBox

ComboList

2 points   

QUESTION 32

When creating an Image object, you can reference either the file name or URL of the image file.

True

False

1 points   

QUESTION 33

Using generics with overloaded methods is allowed, as long as the formal parameter types of each erase to the same raw type.

True

False

1 points   

QUESTION 34

JavaFX Color objects are immutable, meaning that once created, they cannot be changed.

True

False

1 points   

QUESTION 35

Which of the following is not a "built-in" shape with JavaFX?

Circle

Spiral

Rectangle

Ellipse

2 points   

QUESTION 36

A constructor in an abstract class can never be called (invoked.)

True

False

1 points   

QUESTION 37

The main reason for using generics is that they allow some errors to be detected at compile time rather than runtime.

True

False

1 points   

QUESTION 38

A main() method is required to run a non-JavaFX application.

True

False

1 points   

QUESTION 39

A JavaFX ToggleGroup object does not display on the GUI.

True

False

ListView

ComboBox

ListBox

ComboList

Explanation / Answer

Q 31: ComboBox

Q 32: true

Q 33: true

Q 34: true

Q35: Spiral

Q36: false // you can called the abstract class constructor through the concrete class that implements it.

Q37: true // this is one of the reasons but also for 1. Elimination of casts. 2. Enabling programmers to implement generic algorithms.

Q 38: true // yes main method is needed for non-javaFX application whereas JavaFX doesnt need one

Q 39: true // Controls are added within Togglegroup which are displayed on UI

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