Package myAdapter

Interface HMap.HEntry

All Known Implementing Classes:
MapEntryAdapter
Enclosing interface:
HMap
public static interface HMap.HEntry
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.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object o)
    Compares the specified object with this entry for equality.
    Object
    getKey()
    Returns the key corresponding to this entry.
    Object
    getValue()
    Returns the value corresponding to this entry.
    int
    hashCode()
    Returns the hash code value for this map entry.
    Object
    setValue(Object value)
    Replaces the value corresponding to this entry with the specified value (optional operation).

  • Method Details

    • 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

    • getKey

      Object getKey()
      Returns the key corresponding to this entry.
      Returns:
      the key corresponding to this entry

    • getValue

      Object getValue()
      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

    • 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:

    • setValue

      Object setValue(Object 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