Need help with a java program: Imagine that the company you work for is going to

Question

Need help with a java program: Imagine that the company you work for is going to create a lot of lessons on Fractions. You are to create a robust Fraction class that will have all of the following (all examples are for a fraction half that has a numerator of 1 and a denominator of 2): Private integers numerator and denominator ; All public getter and setter functions for the numerator and denominator; Safeguard that the denominator will NEVER become 0! a default constructor with no arguments; a constructor that accepts both the numerator and denominator; a toDecimal method that returns the decimal value of the fraction, example: 1/2 will be 0.5; a toString method that will return the fraction as a string, , example: 1/2 will be "1/2"; a reduce method that will change the numerator and denominator by finding a common denominator and reducing the fraction. Example 3/12 becomes 1/4; Submit the following as part of this assignment: A word document with source code for all files Screen shots showing several different fractions and an example where the user tried to assign 0 to the denominator. Your output should show all of the methods listed above. A class should not interact with the user. If an invalid value is received it simple does not accept it. It does not display a message, it does not exit. It is up to the calling program to check if the value was accepted and display an appropriate message.

Explanation / Answer

Please find my implementation.

################ Fraction.java ########

public class Fraction {
   /**
   * instance variable
   */
   public int numerator;
   /**
   * instance variable
   */
   public int denominator;

   // copy constructor
   public Fraction(Fraction other) {
       numerator = other.numerator;
       denominator = other.denominator;
   }

   /**
   * param n
   * param d
   */
   public Fraction(int n, int d) {

       if(d == 0){
           System.out.println("Denominator can not be negative");
           System.exit(0);
       }
       // finding gcd of n and d
       int gcd = reduce(n, d);

       // storing numerator and denominator in reduced form
       numerator = n/gcd;
       denominator = d/gcd;
   }

   // toString method
   public String toString(){
       return numerator+"/"+denominator;
   }

   // equal method
   public boolean equals(Object other)
   {
       if( other != null && ! (other instanceof Fraction ) ) return false;

       Fraction that = (Fraction)other;

       if(numerator == that.numerator && denominator == that.denominator)
           return true;
       else
           return false;
   }

   /**
   * function to calculate gcd of numerator and denominator
   */
   private int reduce(int numerator, int denominator) {
       int min = numerator;
       int gcd;
       if (numerator > denominator) {
           min = denominator;
       }
       for (gcd = min; gcd > 1; gcd--) {
           if (numerator % gcd == 0 && denominator % gcd == 0) {
               break;
           }
       }

       return gcd;
   }

   public Fraction add(Fraction other){

       int num = numerator*other.denominator + denominator*other.numerator;
       int deno = numerator*denominator;

       int gcd = reduce(num, deno);

       return new Fraction(num/gcd, deno/gcd);
   }

}

###############   

public class FractionDriver {
  
   public static void main(String[] args) {
      
       Fraction a = new Fraction(1,2);
Fraction b = new Fraction(3,4);
Fraction c = new Fraction(b);
System.out.println("a:"+a.toString());
System.out.println("b:"+b.toString());
System.out.println("c:"+c.toString());
  
a.add(b);
a = a.add(b);
System.out.println("a:"+a.toString());
System.out.println("b:"+b.toString());
System.out.println("c:"+c.toString());
      
   }
  

}

/*
Sample output:

a:1/2
b:3/4
c:3/4
a:5/1
b:3/4
c:3/4

*/

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