public class MapEntryParameter<K,V>
extends java.lang.Object
implements java.util.Map.Entry<K,V>
Map.Entry
implementation that can be used as in
input parameter. Since a MapEntryParameter
is not obtained
from a map, it is not attached to any map in particular. To emphasize that
changing this object does not change the map, the setValue(V)
method
always throws UnsupportedOperationException
.
Warning: Use of this interface violates the Java Collections
interface contract since these state that Map.Entry
objects
should only be obtained from Map.entrySet()
sets, while this
class allows constructing them directly. However, it is useful for
performing operations on an entry set such as add(), contains(), etc. For
restrictions see getValue()
and setValue(V)
.
Constructor and Description |
---|
MapEntryParameter(K key,
V value)
Creates a map entry with a given key and value.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(java.lang.Object other)
Compares this entry to a given entry as specified by
Map.Entry.equals(java.lang.Object) . |
K |
getKey()
Returns the key of this entry.
|
V |
getValue()
Returns the value of this entry.
|
int |
hashCode()
Computes a hash code as specified by
Map.Entry.hashCode() . |
V |
setValue(V newValue)
Always throws
UnsupportedOperationException since this
object is not attached to a map. |
java.lang.String |
toString()
Converts the entry to a string representation for debugging.
|
public int hashCode()
Map.Entry.hashCode()
.public boolean equals(java.lang.Object other)
Map.Entry.equals(java.lang.Object)
.public final K getKey()
public final V getValue()
setValue(V)
.
It will not reflect changes made to a Map.public V setValue(V newValue)
UnsupportedOperationException
since this
object is not attached to a map.public java.lang.String toString()
toString
in class java.lang.Object
Copyright (c) 1996, 2019 Oracle and/or its affiliates. All rights reserved.