Animation

Question 1

What is the purpose of the Planet class in the animation example?

a) To create a window for displaying GUI components
b) To represent a planet with properties like position, color, and orbit
c) To manage database connections
d) To handle HTTP requests

Answer 1

b) To represent a planet with properties like position

Question 2

What is the purpose of the computeNewXY method in the Planet class?

a) To create a new window
b) To compute the new X and Y coordinates of the planet based on its orbit
c) To manage database connections
d) To handle HTTP requests

Answer 2

b) To compute the new X and Y coordinates of the planet based on its orbit

Question 3

What is the purpose of the update method in the Planet class?

a) To create a new window
b) To update the planet’s position along its orbit
c) To manage database connections
d) To handle HTTP requests

Answer 3

b) To update the planet’s position along its orbit

Question 4

What is the purpose of the getRadius method in the Planet class?

a) To create a new window
b) To compute the radius of the planet based on its diameter
c) To manage database connections
d) To handle HTTP requests

Answer 4

b) To compute the radius of the planet based on its diameter

Question 5

What is the purpose of the SolarSystem class in the animation example?

a) To create a window for displaying GUI components
b) To manage the animation of planets orbiting the Sun
c) To manage database connections
d) To handle HTTP requests

Answer 5

b) To manage the animation of planets orbiting the Sun

Question 6

What is the purpose of the Runnable interface in the SolarSystem class?

a) To create a new window
b) To enable the class to run as a thread for animation
c) To manage database connections
d) To handle HTTP requests

Answer 6

b) To enable the class to run as a thread for animation

Question 7

What is the purpose of the run method in the SolarSystem class?

a) To create a new window
b) To continuously update and repaint the animation
c) To manage database connections
d) To handle HTTP requests

Answer 7

b) To continuously update and repaint the animation

Question 8

What is the purpose of the update method in the SolarSystem class?

a) To create a new window
b) To update the positions of all planets in the animation
c) To manage database connections
d) To handle HTTP requests

Answer 8

b) To update the positions of all planets in the animation

Question 9

What is the purpose of the paintComponent method in the SolarSystem class?

a) To create a new window
b) To draw the Sun and planets on the panel
c) To manage database connections
d) To handle HTTP requests

Answer 9

b) To draw the Sun and planets on the panel

Question 10

What is the purpose of the start method in the SolarSystem class?

a) To create a new window
b) To start the animation thread
c) To manage database connections
d) To handle HTTP requests

Answer 10

b) To start the animation thread

Question 11

What is the purpose of the DrawPlanets class in the animation example?

a) To create a window for displaying GUI components
b) To set up the frame and start the animation
c) To manage database connections
d) To handle HTTP requests

Answer 11

b) To set up the frame and start the animation

Question 12

What is the purpose of the JFrame class in the DrawPlanets class?

a) To create a window for displaying the animation
b) To manage the animation of planets orbiting the Sun
c) To manage database connections
d) To handle HTTP requests

Answer 12

a) To create a window for displaying the animation

Question 13

What is the purpose of the pack method in the DrawPlanets class?

a) To create a new window
b) To resize the frame to fit its contents
c) To manage database connections
d) To handle HTTP requests

Answer 13

b) To resize the frame to fit its contents

Question 14

What is the purpose of the setVisible method in the DrawPlanets class?

a) To create a new window
b) To make the frame visible
c) To manage database connections
d) To handle HTTP requests

Answer 14

b) To make the frame visible

Question 15

What is the purpose of the Thread.sleep method in the run method of the SolarSystem class?

a) To create a new window
b) To pause the animation for a short time to control the frame rate
c) To manage database connections
d) To handle HTTP requests

Answer 15

b) To pause the animation for a short time to control the frame rate

Question 16

What is the purpose of the Graphics2D class in the paintComponent method of the SolarSystem class?

a) To create a new window
b) To provide advanced drawing capabilities for the animation
c) To manage database connections
d) To handle HTTP requests

Answer 16

b) To provide advanced drawing capabilities for the animation

Question 17

What is the purpose of the fillOval method in the paintComponent method of the SolarSystem class?

a) To create a new window
b) To draw filled circles representing the Sun and planets
c) To manage database connections
d) To handle HTTP requests

Answer 17

b) To draw filled circles representing the Sun and planets

Question 18

What is the purpose of the List<Planet> property in the SolarSystem class?</Planet>

a) To create a new window
b) To store and manage the list of planets in the animation
c) To manage database connections
d) To handle HTTP requests

Answer 18

b) To store and manage the list of planets in the animation

Question 19

What is the purpose of the Thread.ofVirtual() method in the SolarSystem class?

a) To create a new window
b) To create a virtual thread for running the animation
c) To manage database connections
d) To handle HTTP requests

Answer 19

b) To create a virtual thread for running the animation