Class Exercise Write a class called Car that contains instance data that represe
ID: 3814476 • Letter: C
Question
Class Exercise
Write a class called Car that contains instance data that represents the make, model, and year of the car. Define constructors to initialize these values. Include accessor(getter) and mutator(setter) methods for all instance data, and a toString method that returns the data of the car. Create a driver class called CarTest, whose main method instantiates and updates several Car objects.
In the Car Class, you will need:
Three private members to store data for the make model and year
Two constructors:
The first constructor should not accept any values during instantiation (This constructor can initialize the members to an ‘empty string or dash - i.e. “ - “ - or 0).
The second constructor should accept three values for the members during instantiation.
Accessors and Mutators for each private member of the class
A toString method to output the information on each car
In the CarTest driver, you will need:
At three Car objects:
Two of the three objects can be initialized with hardcoded data
One should be initialized with the constructor that accepts no parameters
A Scanner Object to read get information on the third car
Local variables to store information on the third car (and pass it on to the object’s private members)
To test the accessors and mutators you made:
You must use at least one accessor method from the first two Car objects
You must use the mutator to update at least one characteristic from the first two Car objects
Here is some sample output: (Note: your output does not have to follow the same narrative. You can be as creative as you want in order to test the class and objects.)
Here is the information I have on Mr. Smith's three cars:
2015 Ford Taurus
2007 Honda Accord
0 - -
Whoops! It seems we do not have the info on one of his cars!
Enter the information for the third car here:
Make: Hyundai
Model: Elantra
Year: 2014
Mr. Smith traded the Taurus for another Ford from the same year.
Enter the new Ford model: Explorer
Mr. Smith sold the 2007 Accord to buy a more current version.
Enter the new year for the Accord: 2017
Here is the updated information I now have on Mr. Smith's three cars:
2015 Ford Explorer
2017 Honda Accord
2014 Hyundai Elantra
Explanation / Answer
// Car.java
class Car {
private String make;
private String model;
private int year;
public Car(String make, String model, int year) { //parameterized constructor
this.make = make;
this.model = model;
this.year = year;
}
public Car() { //default constructor
make = "--";
model = "--";
year = 0;
}
// Setters and getters below
public String getMake() {
return make;
}
public void setMake(String make) {
this.make = make;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
//toString() method
@Override
public String toString() {
return year +" " + make + " " + model;
}
}
// CarTest.java
import java.util.Scanner;
public class CarTest {
private static Car c1; //create three car objects as mentioned
private static Car c2;
private static Car c3;
public static void main(String[] args) {
String tempMake, tempModel;
int tempYear;
Scanner sc = new Scanner(System.in);
c1 = new Car("Ford", "Taurus", 2015); //initialize them with parameterised constructor
c2 = new Car("Honda", "Accord", 2007); //initialize them with parameterised constructor
c3 = new Car(); //initialize them with default constructor
System.out.println("Here is the information I have on Mr. Smith's three cars:");
System.out.println(c1); //this will automatically call toString() method
System.out.println(c2);
System.out.println(c3);
System.out.println("Whoops! It seems we do not have the info on one of his cars! " +
"Enter the information for the third car here:");
System.out.print("Make: ");
c3.setMake(sc.next()); //use setMake method;
System.out.print("Model: ");
c3.setModel(sc.next());//use setModel method;
System.out.print("Year: ");
c3.setYear(sc.nextInt());
System.out.println("Mr. Smith traded the Taurus for another Ford from the same year.");
System.out.print("Enter the new Ford model: ");
c1.setModel(sc.next());
System.out.println("Mr. Smith sold the 2007 Accord to buy a more current version.");
System.out.print("Enter the new year for the Accord: ");
c2.setYear(sc.nextInt());
/* remaining part is as exactly mentioned in question, no tweak required1 */
System.out.println("Here is the updated information I now have on Mr. Smith's three cars:");
System.out.println(c1);
System.out.println(c2);
System.out.println(c3);
}
}
/*
output:
Here is the information I have on Mr. Smith's three cars:
2015 Ford Taurus
2007 Honda Accord
0 -- --
Whoops! It seems we do not have the info on one of his cars!
Enter the information for the third car here:
Make: Hyndai
Model: Elantra
Year: 2017
Mr. Smith traded the Taurus for another Ford from the same year.
Enter the new Ford model: newModel
Mr. Smith sold the 2007 Accord to buy a more current version.
Enter the new year for the Accord: 2019
Here is the updated information I now have on Mr. Smith's three cars:
2015 Ford newModel
2019 Honda Accord
2017 Hyndai Elantra
*/