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Java Programming Concepts

Information Technology30 CardsCreated 5 months ago

This deck covers key concepts in Java programming, including classes, methods, constructors, and object-oriented principles. It includes examples of using classes like Rectangle, Point, Student, and more, with a focus on understanding object creation, method calls, and class interactions.

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What is the purpose of the Rectangle class?

To model a rectangle with specific width and height.
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Key Terms

Term
Definition
What is the purpose of the Rectangle class?
To model a rectangle with specific width and height.
How do you create a Rectangle object with width 5 and height 12?
Rectangle room = new Rectangle(5, 12);
What does the getArea() method in the Rectangle class do?
It returns the area of the rectangle by multiplying width and height.
What is the output of System.out.println(room) if room is a Rectangle with width 5 and height 12?
Rectangle with width: 5 and height: 12
What does the toString() method in the Rectangle class return?
A string representation of the rectangle's width and height.
How do you call a method to get the height of a Rectangle object r1?
r1.getHeight()
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Java Programming Concepts
TermDefinition
What is the purpose of the Rectangle class?
To model a rectangle with specific width and height.
How do you create a Rectangle object with width 5 and height 12?
Rectangle room = new Rectangle(5, 12);
What does the getArea() method in the Rectangle class do?
It returns the area of the rectangle by multiplying width and height.
What is the output of System.out.println(room) if room is a Rectangle with width 5 and height 12?
Rectangle with width: 5 and height: 12
What does the toString() method in the Rectangle class return?
A string representation of the rectangle's width and height.
How do you call a method to get the height of a Rectangle object r1?
r1.getHeight()
What is the purpose of the Point class?
To represent a point in a 2D space with x and y coordinates.
How do you move a Point object p by 3 units in x and 4 units in y?
p.move(3, 4);
What does the toString() method in the Point class return?
A string in the format 'x, y' representing the point's coordinates.
What is the purpose of the Student class?
To model a student with a first name, last name, and grade level.
How do you create a Student object for Alan Turing in grade 11?
Student alan = new Student("Alan", "Turing", 11);
What does the toString() method in the Student class return?
A string with the student's full name and grade level.
What is the purpose of the TextMessage class?
To represent a text message with a sender, receiver, and message content.
How do you create a TextMessage from Bart to Lisa saying 'Where are you?'?
TextMessage bart = new TextMessage("Bart", "Lisa", "Where are you?");
What is the output of System.out.println(bart) if bart is a TextMessage from Bart to Lisa?
Bart texted Lisa: Where are you?
What is the purpose of the CoinFlips class?
To simulate flipping a coin 100 times and counting heads and tails.
What does the Randomizer.nextBoolean() method do?
Returns a random boolean value, true or false.
What is the purpose of the GeoLocation class?
To represent a geographical location with latitude and longitude.
How do you calculate the distance between two GeoLocation objects?
Using the distanceFrom() method.
What is the purpose of the Triangle class?
To model a triangle with a specific width and height.
How do you calculate the area of a Triangle object?
Using the getArea() method, which returns width * height / 2.
What is the purpose of the Flower class?
To represent a flower with a name, color, genus, and species.
What does the toString() method in the Flower class return?
A string with the flower's color, name, genus, and species.
What is the purpose of the Dog class?
To model a dog with a breed and name.
How do you create a Dog object named Sammy of breed Golden Retriever?
Dog golden = new Dog("Golden Retriever", "Sammy");
What is the purpose of the Pizza class?
To represent a pizza with type, toppings, and size.
What does the toString() method in the Pizza class return?
A string with the pizza's type, toppings, and size.
What is the purpose of the Fraction class?
To represent a mathematical fraction with a numerator and denominator.
How do you set the numerator of a Fraction object to 3?
Using the setNumerator(3) method.
What is the purpose of the Circle class?
To model a circle with a specific radius and calculate its area.