public class Rational extends Object
Constructor and Description |
---|
Rational(long nominator,
long denominator)
Create a Rational with a given numerator and denominator.
|
Rational(Rational r)
Create a copy of a Rational.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
long |
getDenominator()
Gets the denominator of the rational
|
long |
getNumerator()
Gets the numerator of the rational.
|
double |
toDouble()
Gets the rational value as type double.
|
String |
toString()
Returns a string representation of the object.
|
public Rational(long nominator, long denominator)
nominator
- denominator
- public Rational(Rational r)
public long getNumerator()
public long getDenominator()
public double toDouble()
public boolean equals(Object obj)
Object
The equals
method implements an equivalence relation
on non-null object references:
x
, x.equals(x)
should return
true
.
x
and y
, x.equals(y)
should return true
if and only if
y.equals(x)
returns true
.
x
, y
, and z
, if
x.equals(y)
returns true
and
y.equals(z)
returns true
, then
x.equals(z)
should return true
.
x
and y
, multiple invocations of
x.equals(y)
consistently return true
or consistently return false
, provided no
information used in equals
comparisons on the
objects is modified.
x
,
x.equals(null)
should return false
.
The equals
method for class Object
implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x
and
y
, this method returns true
if and only
if x
and y
refer to the same object
(x == y
has the value true
).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode
method, which states
that equal objects must have equal hash codes.
equals
in class Object
obj
- the reference object with which to compare.true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
HashMap
public String toString()
Object
toString
method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString
method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@
', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())