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java.util
Class Hashtable.HashEntry  

java.lang.Object
  java.util.AbstractMap.BasicMapEntry
      java.util.Hashtable.HashEntry

All Implemented Interfaces:

Map.Entry

Enclosing class:

Hashtable

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private static final class Hashtable.HashEntry

extends AbstractMap.BasicMapEntry

Class to represent an entry in the hash table. Holds a single key-value pair. A Hashtable Entry is identical to a HashMap Entry, except that `null' is not allowed for keys and values.

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Field Summary
(package private)  java.lang.Object	key           The key.
(package private)  Hashtable.HashEntry	next           The next entry in the linked list.
(package private)  java.lang.Object	value           The value.

 

Constructor Summary
(package private)	Hashtable.HashEntry(java.lang.Object key, java.lang.Object value)           Simple constructor.

 

Method Summary
boolean	equals(java.lang.Object o)           Compares the specified object with this entry.
java.lang.Object	getKey()           Get the key corresponding to this entry.
java.lang.Object	getValue()           Get the value corresponding to this entry.
int	hashCode()           Returns the hash code of the entry.
java.lang.Object	setValue(java.lang.Object newVal)           Resets the value.
java.lang.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

 

Field Detail

next

Hashtable.HashEntry next

The next entry in the linked list.

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key

java.lang.Object key

The key. Package visible for direct manipulation.

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value

java.lang.Object value

The value. Package visible for direct manipulation.

Constructor Detail

Hashtable.HashEntry

Hashtable.HashEntry(java.lang.Object key,
                    java.lang.Object value)

Simple constructor.

Method Detail

setValue

public java.lang.Object setValue(java.lang.Object newVal)

Resets the value.

Specified by:

setValue in interface Map.Entry

Overrides:

setValue in class AbstractMap.BasicMapEntry

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equals

public final 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()))

Specified by:

equals in interface Map.Entry

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getKey

public final java.lang.Object getKey()

Get the key corresponding to this entry.

Specified by:

getKey in interface Map.Entry

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getValue

public final java.lang.Object getValue()

Get the value corresponding to this entry. If you already called Iterator.remove(), the behavior undefined, but in this case it works.

Specified by:

getValue in interface Map.Entry

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hashCode

public final 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())

Specified by:

hashCode in interface Map.Entry

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toString

public final java.lang.String toString()

This provides a string representation of the entry. It is of the form "key=value", where string concatenation is used on key and value.

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