Class Lfraction

java.lang.Object

Lfraction

All Implemented Interfaces:

java.lang.Comparable<Lfraction>

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

This class presents fractions of form n/d where n and d are long integer numbers. Basic operations and arithmetics for fractions are provided.

Constructor Summary

Constructors

Constructor and Description
Lfraction(long a, long b) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	clone() Clone of the fraction.
int	compareTo(Lfraction m) Comparision of fractions.
Lfraction	divideBy(Lfraction m) Quotient of fractions.
boolean	equals(java.lang.Object m) Equality test.
Lfraction	fractionPart() Extract fraction part of the (improper) fraction (a proper fraction without the integer part).
long	getDenominator() Public method to access the denominator field.
long	getNumerator() Public method to access the numerator field.
int	hashCode() Hashcode has to be equal for equal fractions.
long	integerPart() Integer part of the (improper) fraction.
Lfraction	inverse() Inverse of the fraction.
static void	main(java.lang.String[] param) Main method.
Lfraction	minus(Lfraction m) Difference of fractions.
Lfraction	opposite() Opposite of the fraction.
Lfraction	plus(Lfraction m) Sum of fractions.
Lfraction	times(Lfraction m) Multiplication of fractions.
double	toDouble() Approximate value of the fraction.
static Lfraction	toLfraction(double f, long d) Double value f presented as a fraction with denominator d > 0.
java.lang.String	toString() Conversion to string.
static Lfraction	valueOf(java.lang.String s) Conversion from string to the fraction.

Methods inherited from class java.lang.Object

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

Constructor Detail

Lfraction

public Lfraction(long a,
         long b)

Constructor.

Parameters:

a - numerator

b - denominator > 0

Method Detail

main

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

Main method. Different tests.

getNumerator

public long getNumerator()

Public method to access the numerator field.

Returns:

numerator

getDenominator

public long getDenominator()

Public method to access the denominator field.

Returns:

denominator

toString

public java.lang.String toString()

Conversion to string.

Overrides:

toString in class java.lang.Object

Returns:

string representation of the fraction

equals

public boolean equals(java.lang.Object m)

Equality test.

Overrides:

equals in class java.lang.Object

Parameters:

m - second fraction

Returns:

true if fractions this and m are equal

hashCode

public int hashCode()

Hashcode has to be equal for equal fractions.

Overrides:

hashCode in class java.lang.Object

Returns:

hashcode

plus

public Lfraction plus(Lfraction m)

Sum of fractions.

Parameters:

m - second addend

Returns:

this+m

times

public Lfraction times(Lfraction m)

Multiplication of fractions.

Parameters:

m - second factor

Returns:

this*m

inverse

public Lfraction inverse()

Inverse of the fraction. n/d becomes d/n.

Returns:

inverse of this fraction: 1/this

opposite

public Lfraction opposite()

Opposite of the fraction. n/d becomes -n/d.

Returns:

opposite of this fraction: -this

minus

public Lfraction minus(Lfraction m)

Difference of fractions.

Parameters:

m - subtrahend

Returns:

this-m

divideBy

public Lfraction divideBy(Lfraction m)

Quotient of fractions.

Parameters:

m - divisor

Returns:

this/m

compareTo

public int compareTo(Lfraction m)

Comparision of fractions.

Specified by:

compareTo in interface java.lang.Comparable<Lfraction>

Parameters:

m - second fraction

Returns:

-1 if this < m; 0 if this==m; 1 if this > m

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Clone of the fraction.

Overrides:

clone in class java.lang.Object

Returns:

new fraction equal to this

Throws:

java.lang.CloneNotSupportedException

integerPart

public long integerPart()

Integer part of the (improper) fraction.

Returns:

integer part of this fraction

fractionPart

public Lfraction fractionPart()

Extract fraction part of the (improper) fraction (a proper fraction without the integer part).

Returns:

fraction part of this fraction

toDouble

public double toDouble()

Approximate value of the fraction.

Returns:

numeric value of this fraction

toLfraction

public static Lfraction toLfraction(double f,
                    long d)

Double value f presented as a fraction with denominator d > 0.

Parameters:

f - real number

d - positive denominator for the result

Returns:

f as an approximate fraction of form n/d

valueOf

public static Lfraction valueOf(java.lang.String s)

Conversion from string to the fraction. Accepts strings of form that is defined by the toString method.

Parameters:

s - string form (as produced by toString) of the fraction

Returns:

fraction represented by s