RationalNumber Write a class called RationalNumber that represents a fraction wi
ID: 3937062 • Letter: R
Question
RationalNumber
Write a class called RationalNumber that represents a fraction with an integer numerator and denominator. A RationalNumber object should have the following methods:
Constructs a new rational number to represent the ratio (numerator/denominator). The denominator cannot be 0, so throw an IllegalArgumentException if 0 is passed.
Constructs a new rational number to represent the ratio (0/1).
Returns this rational number’s denominator value; for example, if the ratio is (3/5), returns 5.
Returns this rational number’s numerator value; for example, if the ratio is (3/5), returns 3.
Returns a String representation of this rational number, such as "3/5". You may wish to omit denominators of 1, returning "4" instead of "4/1".
Returns true if this and other are equivalent RationalNumbers
Returns rational number that is this + other.
Returns rational number that is this - other.
Returns rational number that is this * other.
Returns rational number that is this / other.
Your RationalNumber objects should always be in reduced form, avoiding rational numbers such as 3/6 in favor of 1/2, or avoiding 2/–3 in favor of –2/3. This may require the implementation of another method. Consider the Greatest Common Divisor (GCD) definition: The GCD of two integers a and b is the largest integer that is a factor of both a and b. One efficient way to compute the GCD of two numbers is to use Euclid’s algorithm, which states the following:
Explanation / Answer
package org.students;
public class RationalNumber {
private int numerator;
private int denominator;
public RationalNumber()
{
this.numerator=0;
this.denominator=1;
}
public RationalNumber(int numerator, int denominator) {
super();
this.numerator = numerator;
if(denominator==0)
throw new IllegalArgumentException(":: The Denominator cannot be Zero ::");
else
this.denominator = denominator;
}
public int getNumerator() {
return numerator;
}
public int getDenominator() {
return denominator;
}
@Override
public String toString() {
return "RationalNumber [numerator=" + numerator + ", denominator="
+ denominator + "]";
}
}
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