public static interface Multiset.Entry<E>
Multiset.entrySet()
method returns
a view of the multiset whose elements are of this class. A multiset implementation may return
Entry instances that are either live "read-through" views to the Multiset, or immutable
snapshots. Note that this type is unrelated to the similarly-named type Map.Entry
.Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object o)
Indicates whether some other object is "equal to" this one.
|
int |
getCount()
Returns the count of the associated element in the underlying multiset.
|
E |
getElement()
Returns the multiset element corresponding to this entry.
|
int |
hashCode()
Returns a hash code value for the object.
|
String |
toString()
Returns the canonical string representation of this entry, defined as follows.
|
E getElement()
int getCount()
boolean equals(Object o)
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.
Returns true
if the given object is also a multiset entry and the two entries
represent the same element and count. That is, two entries a
and b
are equal
if:
Objects.equal(a.getElement(), b.getElement())
&& a.getCount() == b.getCount()
equals
in class Object
o
- the reference object with which to compare.true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
HashMap
int hashCode()
HashMap
.
The general contract of hashCode
is:
hashCode
method
must consistently return the same integer, provided no information
used in equals
comparisons on the object is modified.
This integer need not remain consistent from one execution of an
application to another execution of the same application.
equals(Object)
method, then calling the hashCode
method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
method, then calling the hashCode
method on each of the
two objects must produce distinct integer results. However, the
programmer should be aware that producing distinct integer results
for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined by
class Object
does return distinct integers for distinct
objects. (This is typically implemented by converting the internal
address of the object into an integer, but this implementation
technique is not required by the
Java™ programming language.)
The hash code of a multiset entry for element element
and count count
is
defined as:
((element == null) ? 0 : element.hashCode()) ^ count
hashCode
in class Object
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
String toString()
" x "
(space, letter x, space), followed by the count.Copyright © 2010–2019. All rights reserved.