JavaFX Programming Using Scenebuilder with eclipse or another ide code this in JAVA code this program 02 - Rational GUI: Using the Rational class code from Lab 4, create a GUI which allows you to add, subtract, multiply, and divide Rational numbers by entering the numerator and denominator in separate fields. The results should also be displayed in two separate fields
JavaFX Programming
Using Scenebuilder with eclipse or another ide code this in JAVA code this program
02 - Rational GUI: Using the Rational class code from Lab 4, create a GUI which allows you to add, subtract, multiply, and divide Rational numbers by entering the numerator and denominator in separate fields. The results should also be displayed in two separate fields.
public class Rational {
// data
private int num;
private int den;
// constructors
/**
* Constructs a Rational from a numerator and denominator
*
* @param n the numerator
* @param d the denominator
*/
public Rational(int n, int d){
if (d==0) {
System.out.println("Cannot divide by 0");
d=1;
}
num = n;
den = d;
simplify();
}
/**
* Constructs a Rational from an integer
*
* @param i the integer. numerator=i, denominator = 1.
*/
public Rational(int i) {
this(i, 1);
}
// selectors
/**
* gets numerator
*
* @return numerator
*/
public int getNumerator(){
return num;
}
/**
* gets denominator
*
* @return denominator
*/
public int getDenominator(){
return den;
}
// manipulators
/**
* Changes numerator, leaving denominator the same
*
* @param n the new numerator
*/
public void setNumerator(int n) {
num = n;
simplify();
}
/**
* Changes denominator, leaving numerator the same
*
* @param d the new denominator
*/
public void setDenominator(int d) {
if (d==0)
System.out.println("Cannot divide by 0");
else {
den = d;
simplify();
}
}
// special methods
/**
* Formats a rational for Strings and printing
*
* @return if denominator==0, numerator. otherwise, numerator/denominator.
*/
public String toString(){
// use getNumerator() not num. allows easy implementation changes.
int n = getNumerator();
int d = getDenominator();
if (d==1)
return n+"";
else
return n + "/" +d;
}
/**
* Determines if two rational objects represent the same number.
* Both numerator and denominator must be the same.
*
* @param r the rational number to compare against
* @return true if same. false if not.
*/
public boolean equals(Object o) {
if (o instanceof Rational){
Rational r = (Rational) o;
return getNumerator()==r.getNumerator() &&
getDenominator()==r.getDenominator();
} else
return false;
}
// other methods
/**
* Multiplies one rational by another.
*
* @param r the rational number to multiply by
* @return the resulting rational
*/
public Rational multiply(Rational r) {
int n = getNumerator() * r.getNumerator();
int d = getDenominator() * r.getDenominator();
Rational product = new Rational(n, d);
return product;
}
/**
* Adds one rational by another.
*
* @param r the rational number to add
* @return the resulting rational
*/
public Rational add(Rational r) {
int n1 = getNumerator();
int n2 = r.getNumerator();
int d1 = getDenominator();
int d2 = r.getDenominator();
Rational product = new Rational(n1*d2 + n2*d1, d1*d2);
return product;
}
// utility methods, not for public use
private void simplify() {
int n = getNumerator();
int d = getDenominator();
int gcd = GCD(n, d);
num = n/gcd;
den = d/gcd;
}
private int GCD(int a, int b) {
if (b==0)
return a;
else
return GCD(b,a%b);
}
}
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