public
static
class
AbstractMap.SimpleImmutableEntry
extends Object
implements
Entry<K, V>,
Serializable
| java.lang.Object | |
| ↳ | java.util.AbstractMap.SimpleImmutableEntry<K, V> |
An Entry maintaining an immutable key and value. This class does not support method setValue. This class may be convenient in methods that return thread-safe snapshots of key-value mappings.
Public constructors | |
|---|---|
AbstractMap.SimpleImmutableEntry(K key, V value)
Creates an entry representing a mapping from the specified key to the specified value. |
|
AbstractMap.SimpleImmutableEntry(Entry<? extends K, ? extends V> entry)
Creates an entry representing the same mapping as the specified entry. |
|
Public methods | |
|---|---|
boolean
|
equals(Object o)
Compares the specified object with this entry for equality. |
K
|
getKey()
Returns the key corresponding to this entry. |
V
|
getValue()
Returns the value corresponding to this entry. |
int
|
hashCode()
Returns the hash code value for this map entry. |
V
|
setValue(V value)
Replaces the value corresponding to this entry with the specified value (optional operation). |
String
|
toString()
Returns a String representation of this map entry. |
Inherited methods | |
|---|---|
 From
class
java.lang.Object
| |
From
interface
java.util.Map.Entry
| |
Developers
AbstractMap.SimpleImmutableEntry (K key,
V value)
Creates an entry representing a mapping from the specified key to the specified value.
| Parameters | |
|---|---|
key |
K:
the key represented by this entry |
value |
V:
the value represented by this entry
|
AbstractMap.SimpleImmutableEntry (Entry<? extends K, ? extends V> entry)
Creates an entry representing the same mapping as the specified entry.
| Parameters | |
|---|---|
entry |
Entry:
the entry to copy
|
boolean equals (Object o)
Compares the specified object with this entry for equality.
Returns true if the given object is also a map entry and
the two entries represent the same mapping. More formally, two
entries e1 and e2 represent the same mapping
if
(e1.getKey()==null ?
e2.getKey()==null :
e1.getKey().equals(e2.getKey()))
&&
(e1.getValue()==null ?
e2.getValue()==null :
e1.getValue().equals(e2.getValue()))
This ensures that the equals method works properly across
different implementations of the Map.Entry interface.
| Parameters | |
|---|---|
o |
Object:
object to be compared for equality with this map entry |
| Returns | |
|---|---|
boolean |
true if the specified object is equal to this map
entry |
See also:
K getKey ()
Returns the key corresponding to this entry.
| Returns | |
|---|---|
K |
the key corresponding to this entry |
V getValue ()
Returns the value corresponding to this entry.
| Returns | |
|---|---|
V |
the value corresponding to this entry |
int hashCode ()
Returns the hash code value for this map entry. The hash code
of a map entry e is defined to be:
(e.getKey()==null ? 0 : e.getKey().hashCode()) ^ (e.getValue()==null ? 0 : e.getValue().hashCode())This ensures that
e1.equals(e2) implies that
e1.hashCode()==e2.hashCode() for any two Entries
e1 and e2, as required by the general
contract of hashCode().
| Returns | |
|---|---|
int |
the hash code value for this map entry |
See also:
V setValue (V value)
Replaces the value corresponding to this entry with the specified value (optional operation). This implementation simply throws UnsupportedOperationException, as this class implements an immutable map entry.
| Parameters | |
|---|---|
value |
V:
new value to be stored in this entry |
| Returns | |
|---|---|
V |
(Does not return) |
| Throws | |
|---|---|
UnsupportedOperationException |
always |
String toString ()
Returns a String representation of this map entry. This implementation returns the string representation of this entry's key followed by the equals character ("=") followed by the string representation of this entry's value.
| Returns | |
|---|---|
String |
a String representation of this map entry |