Provide the UML class diagram for Fraction class and the structure chart for the client  import java.util.Scanner;   //Import the essential package   import java.util.ArrayList;   import java.util.Scanner;   //Define the class Fraction   class Fraction   {   //Declare the variables to store the numerator and denominator   private int n, d;   //Define the default constructor   public Fraction()   {   //Initialize the values   this.n = this.d = 0;   }   //Define the parameterized constructor   public Fraction(int n, int d)   {   //Initialize the variables   this.n = n;   this.d = d;   }   //Define the getter function getNum() that returns the numerator   public int getNum()   {   //Returns numerator   return n;   }   //Define the getter function getDen() that returns the denominator   public int getDen()   {   //Returns denominator   return d;   }   //Define the boolean function isZero() that returns 0 if numerator is 0 and denominator is not equals to zero   public boolean isZero()   {   return (getNum() == 0 && getDen() != 0);   }   //Define the function getSimplifiedFraction() that returns the simplified fraction   public String getSimplifiedFraction()   {   //Decalre the string variable result to store the result   String result = "";   //if the numerator and denominator both are zero   if(getNum() == 0 && getDen() == 0)   //result is zero   result = "0";   //if the numerator is zero and denominator is non-zero   else if(isZero())   //result is zero   result = "0";   //if the numerator is non-zero and denominator is zero   else if(getNum() != 0 && getDen() == 0)   //result is Undefined   result = "Undefined";   //for a defined and non-zero fraction   else   {   //if the remainder is zero   if(getNum() % getDen() == 0)   result = (getNum() / getDen()) + "";   //if the numerator and denominator both are greater than zero   else if(getNum() < 0 && getDen() < 0)   result = (getNum() * -1) + "/" + (getDen() * -1);   //if any of them is zero   else if(getNum() < 0 || getDen() < 0)   {   //if the numerator is greater than zero   if(getNum() < 0)   result = "- (" + (getNum() * -1) + "/" + getDen() + ")";   //if the denominator is zero   else   result = "- (" + getNum() + "/" + (getDen() * -1) + ")";   }   //both are non-zero   else   result = (getNum() + "/" + getDen());   }   //return the result   return result;   }   //Define the method display() that displays the resultant fraction   public void display()   {   //Call and display the fraction   System.out.println(getSimplifiedFraction());   }   }   //Define the class TestFraction   class Main {   //Define the main method   public static void main(String[] args)   {   //Declare the variables to store the numerator and denominator   int num, den;   //Declare an ArrayList to store the results   ArrayList fractions = new ArrayList<>();   //Create the object for scanner class   Scanner sc = new Scanner(System.in);   //use the do-while loop to iterate test the conditions   do   {   //Prompts the user to enter the numerator   System.out.print("Enter the num: ");   //Store the Integer part only   num = Integer.parseInt(sc.nextLine().trim());   //If the numerator is less than zero   if(num < 0)   //Break from loop   break;   //Prompts the user to enter the denominator   System.out.print("Enter the den: ");   //store the integer part only   den = Integer.parseInt(sc.nextLine().trim());   //Create the object of Fraction class   Fraction fraction = new Fraction(num, den);   //Add the resultant fractions into the ArrayList   fractions.add(fraction);   //Display the resultant fraction   System.out.println("Fraction added to list as: " + fraction.getSimplifiedFraction() + "\n");   }while(num >= 0);   //Display all fractions that are stored in the ArrayList   System.out.println("\nDISPLAYING ALL FRACTIONS:\n"   + "-------------------------");   //Use the loop to display the values stored in the ArrayList   for(Fraction fr : fractions)   fr.display();   //to print the new line   System.out.println();   }   }