The document contains code for a FractionDemo class that defines methods for creating, manipulating, and displaying fraction objects. It has errors that need to be fixed, including changing the class name to FractionDemo and combining aspects of the fraction and main classes.

1. can someone fix the errors in this code? the name needs to be FractionDemo.java
//author: Jazmine Tapia
//date: 20 February 2023
//file: FractionDemo.java
/*
Lab 13 will also be using demonstation the
the multiplication of two factors.
*/
//import statements for Scanner class
import java.util.Scanner;
// Define a public class called Fraction
public class FractionDemo
{
// Define private instance variables for the numerator and denominator
private int numerator;
private int denominator;
// Define a constructor for the Fraction class that takes a numerator and denominator as
arguments
public FractionDemo(int numerator, int denominator)
{
// Set the denominator using the setDenominator() method defined below
setDenominator(denominator);
// Set the numerator
this.numerator = numerator;
// Reduce the fraction
reduce();
// Adjust the signs of the numerator and denominator if necessary
adjustSigns();
}
// Define a getter method for the numerator
public int getNumerator()
{
return numerator;
}
// Define a setter method for the numerator
public void setNumerator(int numerator)
{

2. this.numerator = numerator;
}
// Define a getter method for the denominator
public int getDenominator()
{
return denominator;
}
// Define a setter method for the denominator
public void setDenominator(int denominator)
{
// Set the denominator using the setDenominator() method defined below
setDenominator(denominator);
// Reduce the fraction
reduce();
// Adjust the signs of the numerator and denominator if necessary
adjustSigns();
}
// Define a private method to set the denominator
private void setDenominator(int denominator)
{
// If the denominator is zero, throw an exception
if (denominator == 0)
{
throw new IllegalArgumentException("Denominator cannot be zero");
}
// Set the denominator
this.denominator = denominator;
}
// Define a private method to calculate the greatest common divisor of two integers
private int gcd(int a, int b)
{
if (b == 0)
{
return a;
} else {
return gcd(b, a % b);
}
}
// Define a public method to reduce the fraction
public void reduce()
{

3. // Calculate the greatest common divisor of the numerator and denominator
int gcd = gcd(numerator, denominator);
// Divide both the numerator and denominator by the greatest common divisor to reduce the
fraction
numerator /= gcd;
denominator /= gcd;
}
// Define a private method to adjust the signs of the numerator and denominator if necessary
private void adjustSigns()
{
// If the denominator is negative, multiply both the numerator and denominator by -1 to adjust
the signs
if (denominator < 0)
{
numerator *= -1;
denominator *= -1;
}
}
// Define a public method to add two fractions
public FractionDemo add(FractionDemo other)
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
// Get the numerator and denominator for the first fraction
System.out.print("Enter the numerator of the first fraction: ");
int num1 = input.nextInt();
System.out.print("Enter the denominator of the first fraction: ");
int den1 = input.nextInt();
// Get the numerator and denominator for the second fraction
System.out.print("Enter the numerator of the second fraction: ");
int num2 = input.nextInt();
System.out.print("Enter the denominator of the second fraction: ");
int den2 = input.nextInt();
// Create the two Fraction objects
Fraction f1 = new Fraction(num1, den1);
Fraction f2 = new Fraction(num2, den2);
// Display the fractions
System.out.println("f1==" + f1);
System.out.println("f2==" + f2);

4. // Perform arithmetic operations and display the results
System.out.println(f1 + " + " + f2 + " = " + f1.add(f2));
System.out.println(f1 + " - " + f2 + " = " + f1.subtract(f2));
System.out.println(f1 + " * " + f2 + " = " + f1.multiply(f2));
System.out.println(f1 + " / " + f2 + " = " + f1.divide(f2));
}
FractionDemo.java:110: error: illegal start of expression
public static void main(String[] args)
^
FractionDemo.java:139: error: reached end of file while parsing
}
^
2 errors
The code has to be a combination of these two codes
//import statements for Scanner class
import java.util.Scanner;
public class FractionDemo
{
public static void main(String[] args)
{
// Variables for two fractions
int num1, num2, den1, den2;
// Create Scanner object to read keyboard input
Scanner keyboard = new Scanner(System.in);
// Get integers for f1 numerator and denominator
System.out.print("Enter the numerator of the first fraction: ");
num1 = keyboard.nextInt();
System.out.print("Enter the denominator of the first fraction: ");
den1 = keyboard.nextInt();
// Get integers for f2 numerator and denominator
System.out.print("Enter the numerator of the second fraction: ");
num2 = keyboard.nextInt();
System.out.print("Enter the denominator of the second fraction: ");
den2 = keyboard.nextInt();
// Instantiate the two fractions using the input values
Fraction f1 = new Fraction(num1, den1);
Fraction f2 = new Fraction(num2, den2);

5. // Display the two fractions and their product
System.out.println("f1 == " + f1);
System.out.println("f2 == " + f2);
System.out.println(f1 + " * " + f2 + " == " + f1.multiply(f2));
}
}
// Define a class for fractions
class Fraction
{
private int numerator;
private int denominator;
// Constructor for Fraction class
public Fraction(int num, int den)
{
this.numerator = num;
this.denominator = den;
// Check if denominator is zero and set it to 1 if true
if (den == 0)
{
System.out.println("For Fraction: ( " + num + " / " + den + " ):");
System.out.println("Denominator cannot be zero; denominator value is being reset to one.");
this.denominator = 1; // Reset denominator to 1
System.out.println("The Fraction is now: " + this);
}
}
// Define a method for multiplying two fractions
public Fraction multiply(Fraction other)
{
int num = this.numerator * other.numerator;
int den = this.denominator * other.denominator;
return new Fraction(num, den);
}
// Override the toString() method to display the Fraction objects as strings
public String toString()
{
if (denominator == 1)
return " ( " + numerator + " ) ";
else
return " ( " + numerator + " / " + denominator + " ) ";
}
}