java.util
Interface Map.Entry
java.lang.Object
|
+--java.util.Map.Entry
public static interface Map.Entry
A map entry (key-value pair). The Map.entrySet() method returns a set
view of these objects; there is no other valid way to come across them.
These objects are only valid for the duration of an iteration; in other
words, if you mess with one after modifying the map, you are asking
for undefined behavior.
Since:Authors:- Original author unknown
- Eric Blake <ebb9@email.byu.edu>
See Also:
equals
public boolean equals(java.lang.Object o)
Compares the specified object with this entry. Returns true only if
the object is a mapping of identical key and value. In other words,
this must be:
(o instanceof Map.Entry)
&& (getKey() == null ? ((HashMap) o).getKey() == null
: getKey().equals(((HashMap) o).getKey()))
&& (getValue() == null ? ((HashMap) o).getValue() == null
: getValue().equals(((HashMap) o).getValue()))
Parameters:
Returns:
getKey
public Object getKey()
Get the key corresponding to this entry.
Returns:
getValue
public Object getValue()
Get the value corresponding to this entry. If you already called
Iterator.remove(), this is undefined.
Returns:
hashCode
public int hashCode()
Returns the hash code of the entry. This is defined as the
exclusive-or of the hashcodes of the key and value (using 0 for
null
). In other words, this must be:
(getKey() == null ? 0 : getKey().hashCode())
^ (getValue() == null ? 0 : getValue().hashCode())
Returns:
setValue
public Object setValue(java.lang.Object value)
Replaces the value with the specified object (optional operation).
This writes through to the map, and is undefined if you already
called Iterator.remove().
Parameters:
Returns:
Throws: