Question

Lab Assignment 3 Phase 1 Create a class named Car, which is supposed to represent cars within a Java program. The following are the attributes of a typical car: - year which indicates the year in which the car was made. - price indicating the price of the car The year attribute is an integer, whereas the price is a double value. The year can only lie between 1970 and 2011. The price can be any value between 0 and 100000. The class Car should be constructed in such a way that any attempt to place an invalid value in the year and/or price, will result in the attribute being set to its lowest possible value. Create the class, which contains the necessary attributes and setter/getter methods: setYear( ), getYear( ), setPrice( ) and getPrice( ). Test all of its public members, which in this case only represents the setter/getter methods. The instructor will provide his/her own testing code to verify that the class is functioning properly

Answer 1

Check the explanation

Step-by-step explanation:

Car.java

//class Car

public class Car {

//private variable declarations

private int year;

private double price;

//getYear method

public int getYear() {

return year;

}

//setYear method

public void setYear(int year) throws CarException {

//check for the year is in the given range

if(year>=1970&&year<=2011)

this.year = year;

//else throw an exception of type CarException

else

throw new CarException("Invalid Year");

}

//getPrice method

public double getPrice() {

return price;

}

//setPrice method

public void setPrice(double price) throws CarException {

//check for the price is in the given range

if(price>=0&&price<=100000)

this.price = price;

//else throw an exception of type CarException

else

throw new CarException("Invalid Price");

}

//default constructor to set default values

public Car(){

this.year=1970;

this.price=0;

}

//overloaded constructor

public Car(int year, double price) {

//check for the year is in the given range

if(year>=1970&&year<=2011)

this.year = year;

//else initialize with default value

else

this.year=1970;

//check for the price is in the given range

if(price>=0&&price<=100000)

this.price = price;

//else initialize with default value

else

this.price=0;

}

//copy constructor

public Car(Car c){

this.year=c.year;

this.price=c.price;

}

//toString method in the given format

public String toString() {

return "[Year:" + year + ",Price:" + (int)price + "]";

}

//finalize method

public void finalize(){

System.out.println("The finalize method called.");

}

public static void main(String args[]) throws CarException{

Car a=new Car();

System.out.println(a.toString());

Car b=new Car(1986,25000.98);

System.out.println(b.toString());

Car c=new Car();

c.setYear(1900);

c.setPrice(23000);

System.out.println(c.toString());

Car d=new Car();

d.setYear(2000);

d.setPrice(320000);

System.out.println(d.toString());

}

}

CarException.java

//exception class declaration

public class CarException extends Exception{

//private variable declaration

private String message;

//constructor

public CarException(String message) {

super();

this.message = message;

}

//return error message

public String getMessage(){

return message;

}

}