Question

Java

Write a pair of serialization / deserialization apps that create a user’s Car list, w/ a class named Car, which includes model, VINumber (int), and CarMake (an enum, with valid values FORD, GM, TOYOTA, and HONDA) as fields. Use an array similar to the way the SerializeObjects did to handle several BankAccounts. Your app must include appropriate Exception Handling via try catch blocks (what if the file is not found, or the user inputs characters instead of digits for VINumber).

import java.io.*;
import java.util.Scanner;

public class SerializeObjects
{
public static void main(String[] args)
throws IOException
{
double balance; // An account balance
final int NUM_ITEMS = 3; // Number of accounts
  
// Create a Scanner object for keyboard input.
Scanner keyboard = new Scanner(System.in);
  
// Create a BankAccount2 array
BankAccount2[] accounts =
new BankAccount2[NUM_ITEMS];
  
// Populate the array.
for (int i = 0; i < accounts.length; i++)
{
// Get an account balance.
System.out.print("Enter the balance for " +
"account " + (i + 1) + ": ");
balance = keyboard.nextDouble();

// Create an object in the array.
accounts[i] = new BankAccount2(balance);
}
  
// Create the stream objects.
FileOutputStream outStream =
new FileOutputStream("Objects.dat");
ObjectOutputStream objectOutputFile =
new ObjectOutputStream(outStream);
  
// Write the serialized objects to the file.
for (int i = 0; i < accounts.length; i++)
{
objectOutputFile.writeObject(accounts[i]);
}
  

Answer 1

package person;

import java.io.Serializable;

public class Car implements Serializable {
  
   public static final String serialVersionUID = "7920640115507587755";
  
   /**
   * @return the model
   */
   public String getModel() {
       return model;
   }

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

   /**
   * @return the vINumber
   */
   public int getVINumber() {
       return VINumber;
   }

   /**
   * @param vINumber the vINumber to set
   */
   public void setVINumber(int vINumber) {
       VINumber = vINumber;
   }

   /**
   * @return the make
   */
   public CarMake getMake() {
       return make;
   }

   /**
   * @param make the make to set
   */
   public void setMake(CarMake make) {
       this.make = make;
   }

   String model;
   int VINumber;
   CarMake make;

   enum CarMake {
       FORD, GM, TOYOTA, HONDA
   }

   /**
   * @param model
   * @param vINumber
   * @param make
   */
   public Car(String model, int vINumber, CarMake make) {
       super();
       this.model = model;
       VINumber = vINumber;
       this.make = make;
   }

   /* (non-Javadoc)
   * @see java.lang.Object#toString()
   */
   @Override
   public String toString() {
       return "Car [model=" + model + ", VINumber=" + VINumber + ", make=" + make + "]";
   }
}

===========================

package person;

import java.io.*;
import java.util.Scanner;

import person.Car.CarMake;

public class SerializeObjects {
   public static void main(String[] args) throws IOException {

       final int NUM_ITEMS = 2; // Number of Cars

// Create a Scanner object for keyboard input.
       Scanner keyboard = new Scanner(System.in);

// Create a Car array
       Car[] cars = new Car[NUM_ITEMS];

// Populate the array.
       for (int i = 0; i < cars.length; i++) {
// Get Car Name.
           System.out.print("Enter Car Name for Car" + (i + 1) + ": ");
           String carName = keyboard.next();
           // Get Car Name.
           System.out.print("Enter Car Number for Car" + (i + 1) + ": ");
           int VINumber = keyboard.nextInt();
           // Get Car Make.
           System.out.print("Enter Car Number for Car" + (i + 1) + ": ");
           String make = keyboard.next();
           CarMake carMake = null;
           if(make.equals("FORD")) {
               carMake = CarMake.FORD;
           }else if(make.equals("GM")) {
               carMake = CarMake.GM;
           }else if(make.equals("TOYOTA")) {
               carMake = CarMake.TOYOTA;
           }else if(make.equals("HONDA")) {
               carMake = CarMake.HONDA;
           }
// Create an object in the array.
           cars[i] = new Car(carName, VINumber,carMake);
       }

// Create the stream objects.
       FileOutputStream outStream = new FileOutputStream("Objects.dat");
       ObjectOutputStream objectOutputFile = new ObjectOutputStream(outStream);

// Write the serialized objects to the file.
       for (int i = 0; i < cars.length; i++) {
           objectOutputFile.writeObject(cars[i]);
       }
   }
}

=========================

package person;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;

public class DeSerializeObject {

   public static void main(String[] args) throws ClassNotFoundException, IOException {
       // TODO Auto-generated method stub
       FileInputStream fin = new FileInputStream(new File("Objects.dat"));
       ObjectInputStream oin = new ObjectInputStream(fin);
       Car car = null;
       try {
           while ((car = (Car) oin.readObject()) != null) {
               System.out.println(car.toString());

           }
       } catch (Exception e) {

       }

   }

}
=====================

Output

Console output shows the out after deserialization of object.dat file.