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Consider the following class: public class Fraction{ private int numerator; priv

ID: 3920769 • Letter: C

Question

Consider the following class: public class Fraction{ private int numerator;                 private int denominator;                 private static char slash = ‘/’, } Write a program to instantiate an object of the Fraction class to test the class.. Add a constructor(s), set and get methods to the Fraction class appropriately. Using the Serializable Interface, instantiate and write three Fraction objects to a file called “SerialF.dat.” A loop must be used when creating and writing the three objects to the file. You can select the values you wish to use for the denominator and numerator. Directions • Create the Fraction Class. o Add a constructor(s), set and get methods to the Fraction class appropriately. o Ensure the class is Serializable. • Use a loop to create three Fraction objects. o Initialize the three objects, o Write each object to the file“SerialF.dat.” Display an appropriate message if an exception occurs

Explanation / Answer

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

class Fraction implements Serializable{

     private int numerator;
     private int denominator;
     private static char slash = '/';
     public Fraction(){
        numerator = 0;
        denominator = 1;
     }
     public Fraction(int a, int b){
        numerator = a;
        denominator = b;
     }
     public String toString(){
        return (Integer.toString(numerator) + slash + Integer.toString(denominator));
     }
     public void setNumerator(int a){
        numerator = a;
     }
     public void setDenominator(int a){
        if (a != 0)
           denominator = a;
        else
           denominator = 1;
     }
     public int getNumerator(){
        return numerator;
     }
     public int getDenominator(){
        return denominator;
     }
}

public class Demo246 {
    public static void main(String[] args){

       Fraction[] list = new Fraction[3];
       for (int i = 0; i<3; i++){
          list[i] = new Fraction();
          list[i].setNumerator(i);
          list[i].setDenominator(i+1);
       }
       try {
          FileOutputStream fout = new FileOutputStream("Serial.dat");
          ObjectOutputStream oout = new ObjectOutputStream(fout);
          for (int i = 0; i<3; i++){
              oout.writeObject(list[i]);
          }
          oout.close();
      }
      catch(Exception e){
           System.out.println("IOException is caught");
      }
     
    }
}

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