Part I Write a class PassengerListException that extends Exception with the foll

Question

Part I

Write a class PassengerListException that extends Exception with the following constructors:

A default constructor that gives the error message "Too many passengers."

A constructor that takes a string and uses this for the error message

Part II

Write a class PassengerCar with the following attributes:

Two instance variables (with corresponding getters and setters):

model - a String for the model of the passenger car.

passengers - an array of Strings with length 4, holding the names of the passengers the Car holds.

A default constructor that initializes name to be "NoName".

A constructor that takes a String to set the model of the car

Two methods:

assignPassengers (no input parameters or return values) - This method should ask a user to input passenger from the console window until the user enters an empty line, which indicates the end of the array. If the user enters more than 4 passengers, throw a PassengerListException

writeCar (no input parameters or return values) - writes the model of the car and the names of the cars's passengers to the console window

Part III

Write a class Coupe, a subclass of PassengerCar, for cars which can hold at most 2 passengers. The class should include the following:

A default constructor that invokes the superclass constructor

A constructor that takes a String to set the model of the Coupe

An overridden assignPassengers that throws a PassengerListException when a user tries to assign more than 2 passengers to a Coupe.

Part IV

Write a class TestCar that does the following:

Creates a car with the model Ford Mustang

Assigns some Passengers to the Ford Mustang

Writes the information about the Ford Mustang to the console window

Creates a Coupe with the name Deuce Coupe

Assigns passengers to the Deuce Coupe

Writes the information about the Deuce Coupe to the console

Explanation / Answer

PassengerListException.Java

package com.chegg.test;

/**
* Custom Exception Class
*
* @author yourName
*
*/
public class PassengerListException extends Exception {

   /**
   * Generated serialVersionUID
   */
   private static final long serialVersionUID = 5699637338573851662L;

   PassengerListException() {
       System.out.println("Exception ocuured while running the program");
   }

   PassengerListException(String exception) {
       System.out.println(exception);
   }
}

PassengerCar.java

package com.chegg.test;

import java.util.Arrays;
import java.util.Scanner;

public class PassengerCar {
   private String model;
   private String[] passengers = new String[4];

   PassengerCar() {
       for (int i = 0; i < passengers.length; i++) {
           setPassengers(i, "NoName");
       }
   }

   PassengerCar(String model) {
       super();
       this.model = model;
   }

   /**
   * @return the model
   */
   public String getModel() {
       return model;
   }

   /**
   * @param model
   * the model to set
   */
   public void setModel(String model) {
       this.model = model;
   }

   /**
   * @return the passengers
   */
   public String[] getPassengers() {
       return passengers;
   }

   /**
   * @param passengers
   * the passengers to set
   */
   public void setPassengers(int pos, String value) {

       this.passengers[pos] = value;
   }

   public void assignPassengers() throws PassengerListException {
       @SuppressWarnings("resource")
       Scanner sc = new Scanner(System.in);
       String name = null;
       int i = 0;
       do {
           System.out.println("Please enter the passenger Name:");
           name = sc.nextLine();
           try {
               if (!name.isEmpty()) {
                   setPassengers(i, name);
                   i++;
               } else {
                   break;
               }
           } catch (ArrayIndexOutOfBoundsException aioe) {
               throw new PassengerListException(
                       "User enters more than 4 passengers");
           }

       } while (!name.isEmpty());
   }

   // Writes the information
   public void writeCar() {
       System.out.println("Model of the car:" + this.getModel());
       System.out.println("Passengers of the car:"
               + Arrays.toString(this.getPassengers()));

   }

}

Coupe.java

package com.chegg.test;

import java.util.Scanner;

/**
* Class for Coupe characteristics
*
* @author yourName
*
*/
public class Coupe extends PassengerCar {

   Coupe() {
       super();
   }

   Coupe(String model) {
       setModel(model);
   }

   @Override
   public void assignPassengers() throws PassengerListException {
       int count = 0;
       @SuppressWarnings("resource")
       Scanner sc = new Scanner(System.in);
       String name = null;
       do {
           System.out.println("Please enter the passenger Name:");
           name = sc.nextLine();
           if (count <= 2) {
               if (!name.isEmpty()) {
                   setPassengers(count, name);
                   count++;
               } else {
                   break;
               }
           } else {
               throw new PassengerListException(
                       "User tries to assign more than 2 passengers to a Coupe");
           }

       } while (!name.isEmpty());

   }

}

TestCar.java

package com.chegg.test;

/**
* Tester class to get the details of car and model and passenger information
*
* @author yourName
*
*/
public class TestCar {
   public static void main(String[] args) {
       try {
           PassengerCar car = new PassengerCar("Ford Mustang");
           car.assignPassengers();
           car.writeCar();
           Coupe coupe = new Coupe("Deuce Coupe");
           coupe.assignPassengers();
           coupe.writeCar();
       } catch (PassengerListException ple) {

       }
   }
}

Output:

Please enter the passenger Name:

pavan
Please enter the passenger Name:
kumar
Please enter the passenger Name:
Reddy
Please enter the passenger Name:
Kamatham
Please enter the passenger Name:

Model of the car:Ford Mustang
Passengers of the car:[pavan, kumar, Reddy, Kamatham]
Please enter the passenger Name:
Penchal
Please enter the passenger Name:
kamatham
Please enter the passenger Name:

Model of the car:Deuce Coupe
Passengers of the car:[Penchal, kamatham, NoName, NoName]

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