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java.lang.Objectjava.util.AbstractMap.SimpleEntry<K,V>
public static class AbstractMap.SimpleEntry<K,V>
A class which implements Map.Entry. It is shared by HashMap, TreeMap, Hashtable, and Collections. It is not specified by the JDK, but makes life much easier.
| Constructor Summary | |
|---|---|
AbstractMap.SimpleEntry(K newKey,
V newValue)
Basic constructor initializes the fields. |
|
AbstractMap.SimpleEntry(Map.Entry<? extends K,? extends V> entry)
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| Method Summary | |
|---|---|
boolean |
equals(Object o)
Compares the specified object with this entry. |
K |
getKey()
Get the key corresponding to this entry. |
V |
getValue()
Get the value corresponding to this entry. |
int |
hashCode()
Returns the hash code of the entry. |
V |
setValue(V newVal)
Replaces the value with the specified object. |
String |
toString()
This provides a string representation of the entry. |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public AbstractMap.SimpleEntry(K newKey,
V newValue)
newKey - the keynewValue - the valuepublic AbstractMap.SimpleEntry(Map.Entry<? extends K,? extends V> entry)
| Method Detail |
|---|
public boolean equals(Object o)
(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()))
equals in interface Map.Entry<K,V>equals in class Objecto - the object to compare
true if it is equalObject.hashCode()public K getKey()
getKey in interface Map.Entry<K,V>public V getValue()
getValue in interface Map.Entry<K,V>public int hashCode()
(getKey() == null ? 0 : getKey().hashCode())
^ (getValue() == null ? 0 : getValue().hashCode())
hashCode in interface Map.Entry<K,V>hashCode in class ObjectObject.equals(Object),
System.identityHashCode(Object)public V setValue(V newVal)
setValue in interface Map.Entry<K,V>newVal - the new value to store
NullPointerException - if the map forbids null values.
UnsupportedOperationException - if the map doesn't support
put().
ClassCastException - if the value is of a type unsupported
by the map.
IllegalArgumentException - if something else about this
value prevents it being stored in the map.public String toString()
toString in class ObjectObject.getClass(),
Object.hashCode(),
Class.getName(),
Integer.toHexString(int)
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