Added in API level 9

Summary: Ctors | Methods | Inherited Methods

AbstractMap.SimpleEntry

public static class AbstractMap.SimpleEntry
extends Object implements Entry<K, V>, Serializable

java.lang.Object
↳	java.util.AbstractMap.SimpleEntry<K, V>

---

An Entry maintaining a key and a value. The value may be changed using the setValue method. Instances of this class are not associated with any map nor with any map's entry-set view.

Summary

Public constructors
SimpleEntry(Entry<? extends K, ? extends V> entry) Creates an entry representing the same mapping as the specified entry.
SimpleEntry(K key, V value) Creates an entry representing a mapping from the specified key to the specified value.

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.
String	toString() Returns a String representation of this map entry.

Inherited methods
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
From interface java.util.Map.Entry static <K, V> Comparator<Entry<K, V>> comparingByKey(Comparator<? super K> cmp) Returns a comparator that compares Map.Entry by key using the given Comparator. static <K extends Comparable<? super K>, V> Comparator<Entry<K, V>> comparingByKey() Returns a comparator that compares Map.Entry in natural order on key. static <K, V> Comparator<Entry<K, V>> comparingByValue(Comparator<? super V> cmp) Returns a comparator that compares Map.Entry by value using the given Comparator. static <K, V extends Comparable<? super V>> Comparator<Entry<K, V>> comparingByValue() Returns a comparator that compares Map.Entry in natural order on value. static <K, V> Entry<K, V> copyOf(Entry<? extends K, ? extends V> e) Returns a copy of the given Map.Entry. abstract boolean equals(Object o) Compares the specified object with this entry for equality. abstract K getKey() Returns the key corresponding to this entry. abstract V getValue() Returns the value corresponding to this entry. abstract int hashCode() Returns the hash code value for this map entry. abstract V setValue(V value) Replaces the value corresponding to this entry with the specified value (optional operation).

Public constructors

SimpleEntry

Added in API level 9

public SimpleEntry (Entry<? extends K, ? extends V> entry)

Creates an entry representing the same mapping as the specified entry.

Parameters
entry	Entry: the entry to copy

SimpleEntry

Added in API level 9

public SimpleEntry (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

Public methods

equals

Added in API level 9

public 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:

• hashCode()

getKey

Added in API level 9

public K getKey ()

Returns the key corresponding to this entry.

Returns
K	the key corresponding to this entry

getValue

Added in API level 9

public V getValue ()

Returns the value corresponding to this entry.

Returns
V	the value corresponding to this entry

hashCode

Added in API level 9

public 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.

Returns
int	the hash code value for this map entry

See also:

• equals(Object)

setValue

Added in API level 9

public V setValue (V value)

Replaces the value corresponding to this entry with the specified value.

Parameters
value	V: new value to be stored in this entry

Returns
V	the old value corresponding to the entry

toString

Added in API level 9

public 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