In JavaFX, how to let a button react on a mouse click?

By providing an EventHandler object.

Which statement about interfaces is RIGHT?

They can have default method implementations.

Have a look at the following code (picture), why is the code not correct?

Private fields variables are not allowed

Have a look at the following code (picture), why is the code not correct?

Abstract methods are not allowed in non-abstract-classes.

Which property definition is NOT correct?

IntegerProperty num3 = new Integer(4);

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Fontys Venlo - Programming Concepts - week 13

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Questions 10

Answers

1
In JavaFX, how to let a button react on a mouse click?
By calling the button.click() method
Buttons handle clicks automatically.
By binding the click property: button.property(new Handler);
By providing an EventHandler<ActionEvent> object.
2
Which statement about interfaces is RIGHT?
They can have field variables.
They can have default method implementations.
They can be instantiated.
They cannot extend other interfaces
3
Which of the following can you instantiate with new?
All answers are correct
Interfaces
Abstract class
Concrete classes
4
Regarding Property Bindings, what is the output of the following code (see picture)
3 3
3 4
4 5
2 3
5
Have a look at the following code (picture), why is the code not correct?
getFirstname() method mustnot be abstract
Private fields variables are not allowed
getLastname() method must be abstract.
Methods must have an implementation.
6
Regarding JavaFX stage, scene and pane, which relationsship is correct? (→ means HAS A)
scene → stage → pane
stage → pane → scene
stage → scene → pane
pane → stage → scene
7
Which statement about abstract classes is RIGHT
They can have field variables.
Cannot be used to define common behaviour.
They can be instantiated.
They cannot extend other abstract classes.
8
Have a look at the following code (picture), why is the code not correct?
Field "name" is not allowed when you have abstract methods.
Abstract methods are only allowed in interfaces.
Abstract methods are not allowed in non-abstract-classes.
Fields and abstract methods must be used in interfaces.
9
Which property definition is NOT correct?
IntegerProperty num3 = new Integer(4);
DoubleProperty dbl1 = new SimpleDoubleProperty(10.1);
IntegerProperty num1 = new SimpleIntegerProperty(1);
StringProperty str1 = new SimpleStringProperty("Test");
10
In JavaFX what is a stage?
A container for digital actor objects only.
The same as a pane.
A window
A video player

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