eu.reservoir.monitoring.core
Class Rational

java.lang.Object
  eu.reservoir.monitoring.core.Rational

All Implemented Interfaces:

java.lang.Comparable<Rational>

Direct Known Subclasses:

Timing

public class Rational
extends java.lang.Object
implements java.lang.Comparable<Rational>

Compilation: javac Rational.java Execution: java Rational Immutable ADT for Rational numbers. Invariants ----------- - gcd(num, den) = 1, i.e, the rational number is in reduced form - den >= 1, the denominator is always a positive integer - 0/1 is the unique representation of 0 We employ some tricks to stave of overflow, but if you need arbitrary precision rationals, use BigRational.java.

Constructor Summary

Rational(int numerator, int denominator)

Method Summary

int	compareTo(Rational b)
int	denominator()
Rational	div(java.lang.Integer i)
Rational	div(Rational b)
boolean	equals(java.lang.Object y)
int	hashCode()
static void	main(java.lang.String[] args)
static Rational	mediant(Rational r, Rational s)
Rational	minus(java.lang.Integer i)
Rational	minus(Rational b)
Rational	multiply(java.lang.Integer i)
Rational	multiply(Rational b)
Rational	negative()
int	numerator()
Rational	plus(java.lang.Integer i)
Rational	plus(Rational b)
Rational	reciprocal()
java.math.BigDecimal	toBigDecimal(int scale)
double	toDouble()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Rational

public Rational(int numerator,
                int denominator)

Method Detail

numerator

public int numerator()

denominator

public int denominator()

plus

public Rational plus(Rational b)

plus

public Rational plus(java.lang.Integer i)

minus

public Rational minus(Rational b)

minus

public Rational minus(java.lang.Integer i)

negative

public Rational negative()

multiply

public Rational multiply(Rational b)

multiply

public Rational multiply(java.lang.Integer i)

div

public Rational div(Rational b)

div

public Rational div(java.lang.Integer i)

reciprocal

public Rational reciprocal()

toDouble

public double toDouble()

toBigDecimal

public java.math.BigDecimal toBigDecimal(int scale)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

compareTo

public int compareTo(Rational b)

Specified by:

compareTo in interface java.lang.Comparable<Rational>

equals

public boolean equals(java.lang.Object y)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

mediant

public static Rational mediant(Rational r,
                               Rational s)

main

public static void main(java.lang.String[] args)