Package Summary  Overview Summary

class:AbstractMap.SimpleImmutableEntry [NONE]

  • All Implemented Interfaces:
    Serializable, Map.Entry<K,V>
    Enclosing class:

    public static class AbstractMap.SimpleImmutableEntry<K,V>
    extends Object
    implements Map.Entry<K,V>, Serializable
    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.
    See Also:
    Serialized Form

constructor:<init>(K,V) [NONE]

  • SimpleImmutableEntry

    public SimpleImmutableEntry​(K key,
                                V value)
    Creates an entry representing a mapping from the specified key to the specified value.
    key - the key represented by this entry
    value - the value represented by this entry

constructor:<init>(java.util.Map.Entry) [NONE]

  • SimpleImmutableEntry

    public SimpleImmutableEntry​(Map.Entry<? extends K,? extends V> entry)
    Creates an entry representing the same mapping as the specified entry.
    entry - the entry to copy

method:getKey() [NONE]

  • getKey

    public K getKey()
    Returns the key corresponding to this entry.
    Specified by:
    getKey in interface Map.Entry<K,V>
    the key corresponding to this entry

method:getValue() [NONE]

  • getValue

    public V getValue()
    Returns the value corresponding to this entry.
    Specified by:
    getValue in interface Map.Entry<K,V>
    the value corresponding to this entry

method:setValue(V) [NONE]

  • setValue

    public 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.
    Specified by:
    setValue in interface Map.Entry<K,V>
    value - new value to be stored in this entry
    (Does not return)
    UnsupportedOperationException - always

method:equals(java.lang.Object) [NONE]

  • equals

    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.getValue()==null ?
        e2.getValue()==null :
    This ensures that the equals method works properly across different implementations of the Map.Entry interface.
    Specified by:
    equals in interface Map.Entry<K,V>
    equals in class Object
    o - object to be compared for equality with this map entry
    true if the specified object is equal to this map entry
    See Also:

method:hashCode() [NONE]

  • hashCode

    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().
    Specified by:
    hashCode in interface Map.Entry<K,V>
    hashCode in class Object
    the hash code value for this map entry
    See Also:

method:toString() [NONE]

  • toString

    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.
    toString in class Object
    a String representation of this map entry

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