Please help in java Alter your Fraction class so that the Fr

Please help in java:

Alter your Fraction class so that the Fractions are reduced whenever necessary - in the constructor and mutators.

Only consider POSITIVE values for the numerator and denominator.

{

public static class Fraction
{
private int numerator;
private int denominator;

public Fraction()
{
numerator = 0;
denominator=1;
}
public Fraction(int n, int d)
{ int g=gcd(n,d);
//complete this
}

public int getNumerator() {
return numerator;
}

public void setNumerator(int n) {
int d=denominator;
int g=gcd(n,d);
//complete this
  
}

public int getDenominator() {
return denominator;
}

  
public void setDenominator(int d) {
int n=numerator;
int g=gcd(n,d);
//complete this
}
public Fraction add(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*d+b*c,b*d);
return v;
}
public Fraction subtract(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*d-b*c,b*d);
return v;
}
public Fraction multiply(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*c,b*d);
return v;
}
public Fraction divide(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*d,b*c);
return v;
}
public String toString()
{
return numerator + \"/\" + denominator;
}
  
private int gcd(int int1, int int2)
{
//complete this   
}


}
public static void main(String[] args) {

//test constructor
Fraction g= new Fraction(4,8);
System.out.println(g);
Fraction f= new Fraction();
f.setNumerator(60);
f.setDenominator(90);
System.out.print(\"60/90 is \");
System.out.println(f);
Scanner keyboard = new Scanner (System.in);
//get the data for the next fraction and construct it
int n1=keyboard.nextInt();
int d1=keyboard.nextInt();
Fraction one=new Fraction (n1,d1);
//get the data for the next fraction and construct it
n1=keyboard.nextInt();
d1=keyboard.nextInt();
Fraction two=new Fraction (n1,d1);
//test methods for add, subtract, multiply, divide
System.out.println(one + \" + \" + two + \" = \" + one.add(two));
System.out.println(one + \" - \" + two + \" = \" + one.subtract(two));
System.out.println(one + \" * \" + two + \" = \" + one.multiply(two));
System.out.println(one + \" divided by \" + two + \" = \" + one.divide(two));
  
}
}

Solution

Hi

I have updated the code and hihlighted the code changes below.

Fraction.java

import java.util.Scanner;

public class Fraction
{
private int numerator;
private int denominator;
public Fraction()
{
numerator = 0;
denominator=1;
}
public Fraction(int n, int d)
{ int g=gcd(n,d);
//complete this
numerator = n;
denominator=d;
}

public int getNumerator() {
return numerator;
}

public void setNumerator(int n) {
int d=denominator;
int g=gcd(n,d);
//complete this
this.numerator = n;
}

public int getDenominator() {
return denominator;
}
  
public void setDenominator(int d) {
int n=numerator;
int g=gcd(n,d);
//complete this
denominator = d;
}
public Fraction add(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*d+b*c,b*d);
return v;
}
public Fraction subtract(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*d-b*c,b*d);
return v;
}
public Fraction multiply(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*c,b*d);
return v;
}
public Fraction divide(Fraction g)
{
int a=this.numerator;
int b=this.denominator;
int c=g.numerator;
int d=g.denominator;
Fraction v=new Fraction(a*d,b*c);
return v;
}
public String toString()
{
return numerator + \"/\" + denominator;
}
  
private int gcd(int int1, int int2)
{
//complete this
   return int2 == 0 ? int1 : gcd(int2, int1 % int2);
}

public static void main(String[] args) {

//test constructor
Fraction g= new Fraction(4,8);
System.out.println(g);
Fraction f= new Fraction();
f.setNumerator(60);
f.setDenominator(90);
System.out.print(\"60/90 is \");
System.out.println(f);
Scanner keyboard = new Scanner (System.in);
//get the data for the next fraction and construct it
int n1=keyboard.nextInt();
int d1=keyboard.nextInt();
Fraction one=new Fraction (n1,d1);
//get the data for the next fraction and construct it
n1=keyboard.nextInt();
d1=keyboard.nextInt();
Fraction two=new Fraction (n1,d1);
//test methods for add, subtract, multiply, divide
System.out.println(one + \" + \" + two + \" = \" + one.add(two));
System.out.println(one + \" - \" + two + \" = \" + one.subtract(two));
System.out.println(one + \" * \" + two + \" = \" + one.multiply(two));
System.out.println(one + \" divided by \" + two + \" = \" + one.divide(two));
  
}
}

Output:

4/8
60/90 is 60/90
4
5
6
7
4/5 + 6/7 = 58/35
4/5 - 6/7 = -2/35
4/5 * 6/7 = 24/35
4/5 divided by 6/7 = 28/30