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

Answer:

Check the explanation

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;

  }

 

}