TopBlend:
Here is the
first difference.
There are 11 differences.
is old.
is new.
java.util
Interface
Map.Entry<K,V>
Map.Entry
-
Enclosing interface:
-
Map
<
K
,
V
>
-
public static interface
Map.Entry<K,V>
Map.Entry
A map entry (key-value pair). The
Map.entrySet
method returns a collection-view of the map, whose elements are of this class. The
only
way to obtain a reference to a map entry is from the iterator of this collection-view. These
Map.Entry
objects are valid
only
for the duration of the iteration; more formally, the behavior of a map entry is undefined if the backing map has been modified after the entry was returned by the iterator, except through the iterator's own
remove
operation, or through the
setValue
operation on a map entry returned by the iterator.
-
Since:
-
1.2
-
See Also:
-
Map.entrySet()
Method Summary
|
boolean |
equals
(
Object
o)
Compares the specified object with this entry for equality. |
K
Object
|
getKey
()
Returns the key corresponding to this entry. |
V
Object
|
getValue
()
Returns the value corresponding to this entry. |
int |
hashCode
()
Returns the hash code value for this map entry. |
V
Object
|
setValue
setValue
(
V
Object
Replaces the value corresponding to this entry with the specified value (optional operation). |
getKey
KObjectgetKey()
-
Returns the key corresponding to this entry.
-
-
Returns:
-
the key corresponding to this entry.
getValue
VObjectgetValue()
-
Returns the value corresponding to this entry. If the mapping has been removed from the backing map (by the iterator's
remove
operation), the results of this call are undefined.
-
-
Returns:
-
the value corresponding to this entry.
setValue
VObjectsetValue( VObject value)
-
Replaces the value corresponding to this entry with the specified value (optional operation). (Writes through to the map.) The behavior of this call is undefined if the mapping has already been removed from the map (by the iterator's
remove
operation).
-
-
Parameters:
-
value - new value to be stored in this entry.
-
Returns:
-
old value corresponding to the entry.
-
Throws:
-
UnsupportedOperationException
- if the
put
operation is not supported by the backing map.
-
ClassCastException
- if the class of the specified value prevents it from being stored in the backing map.
-
IllegalArgumentException
- if some aspect of this value prevents it from being stored in the backing map.
-
NullPointerException
- the backing map does not permit
null
values, and the specified value is
null
.
equals
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.
-
-
Overrides:
-
equals
in class
Object
-
-
Parameters:
-
o - object to be compared for equality with this map entry.
-
Returns:
-
true
if the specified object is equal to this map entry.
-
See Also:
-
Object.hashCode()
,
Hashtable
hashCode
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
Object.hashCode
.
-
-
Overrides:
-
hashCode
in class
Object
-
-
Returns:
-
the hash code value for this map entry.
-
See Also:
-
Object.hashCode()
,
Object.equals(Object)
,
equals(Object)