Chapter 13, Problem 1MC

Line, Circle, and Rectangle are subclasses of rhe    class.

1. a. Sprite
2. b. Geometry
3. c. BasicShape
4. d. Shape

Program Description Answer

The “Line”, “Circle” and “Rectangle” are subclasses of the “Shape”.

Hence, the correct answer is option “D”.

Explanation of Solution

Shape class:

• The basic functionality for drawing shapes is included in “Shape” class.
• A specific shape is been drawn by each of the subclasses in “Shape” class.
• The “Shape” class is present in JavaFX library.
• The lines are been drawn using “Line” class.
• The circles are been drawn using “Circle” class.
• The “Shape” class as well as its subclasses is present in “javafx.scene.shape” package.

Example:

The example for a “Line” class constructor is given below:

Line(startX, startY, endX, endY)

Here, “startX” and “startY” denotes starting point’s “X” and “Y” coordinates. The “endX” and “endY” denotes ending point’s “X” and “Y” coordinates.

Explanation for incorrect options:

a. Sprite:

The “Sprite” class does not involve the subclasses for “Line”, “Circle” and “Rectangle”.

Hence, the option “A” is wrong.

b. Geometry:

The “Geometry” class does not involve the subclasses for “Line”, “Circle” and “Rectangle”.

Hence, the option “B” is wrong.

c. BasicShape:

The “BasicShape” class does not involve the subclasses for “Line”, “Circle” and “Rectangle”.

Hence, the option “C” is wrong.