LinkedHashtable (Apache Ant API)
Description: declaration: package: org.apache.tools.ant.util, class: LinkedHashtable

# Class LinkedHashtable<K,V>

java.lang.Object
java.util.Dictionary<K,V>
java.util.Hashtable<K,V>
org.apache.tools.ant.util.LinkedHashtable<K,V>

All Implemented Interfaces:
  `Serializable, Cloneable, Map<K,V>`

public class LinkedHashtable<K,V> extends Hashtable<K,V>
Subclass of Hashtable that wraps a LinkedHashMap to provide predictable iteration order.

This is not a general purpose class but has been written because the protected members of `Copy` prohibited later revisions from using a more predictable collection.

Methods are synchronized to keep Hashtable's contract.

Since:
  Ant 1.8.2
See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `LinkedHashtable()`
  `LinkedHashtable(int initialCapacity)`
  `LinkedHashtable(int initialCapacity, float loadFactor)`
  `LinkedHashtable(Map<K,V> m)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `clear()`
  `boolean`
  `contains(Object value)`
  `boolean`
  `containsKey(Object value)`
  `boolean`
  `containsValue(Object value)`
  `Enumeration<V>`
  `elements()`
  `Set<Map.Entry<K,V>>`
  `entrySet()`
  `boolean`
  `equals(Object o)`
  `V`
  `get(Object k)`
  `int`
  `hashCode()`
  `boolean`
  `isEmpty()`
  `Enumeration<K>`
  `keys()`
  `Set<K>`
  `keySet()`
  `V`
  `put(K k, V v)`
  `void`
  `putAll(Map<? extends K, ? extends V> m)`
  `V`
  `remove(Object k)`
  `int`
  `size()`
  `String`
  `toString()`
  `Collection<V>`
  `values()`

  ### Methods inherited from class Hashtable

  `clone, compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, rehash, remove, replace, replace, replaceAll`

  ### Methods inherited from class Object

  `finalize, getClass, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### LinkedHashtable

    public LinkedHashtable()

  - ### LinkedHashtable

    public LinkedHashtable(int initialCapacity)

  - ### LinkedHashtable

    public LinkedHashtable(int initialCapacity, float loadFactor)

  - ### LinkedHashtable

    public LinkedHashtable(Map<K,V> m)

- ## Method Details

  - ### clear

    public void clear()
    Specified by:
      `clear` in interface `Map<K,V>`
    Overrides:
      `clear` in class `Hashtable<K,V>`

  - ### contains

    public boolean contains(Object value)
    Overrides:
      `contains` in class `Hashtable<K,V>`

  - ### containsKey

    public boolean containsKey(Object value)
    Specified by:
      `containsKey` in interface `Map<K,V>`
    Overrides:
      `containsKey` in class `Hashtable<K,V>`

  - ### containsValue

    public boolean containsValue(Object value)
    Specified by:
      `containsValue` in interface `Map<K,V>`
    Overrides:
      `containsValue` in class `Hashtable<K,V>`

  - ### elements

    public Enumeration<V> elements()
    Overrides:
      `elements` in class `Hashtable<K,V>`

  - ### entrySet

    public Set<Map.Entry<K,V>> entrySet()
    Specified by:
      `entrySet` in interface `Map<K,V>`
    Overrides:
      `entrySet` in class `Hashtable<K,V>`

  - ### equals

    public boolean equals(Object o)
    Specified by:
      `equals` in interface `Map<K,V>`
    Overrides:
      `equals` in class `Hashtable<K,V>`

  - ### get

    public V get(Object k)
    Specified by:
      `get` in interface `Map<K,V>`
    Overrides:
      `get` in class `Hashtable<K,V>`

  - ### hashCode

    public int hashCode()
    Specified by:
      `hashCode` in interface `Map<K,V>`
    Overrides:
      `hashCode` in class `Hashtable<K,V>`

  - ### isEmpty

    public boolean isEmpty()
    Specified by:
      `isEmpty` in interface `Map<K,V>`
    Overrides:
      `isEmpty` in class `Hashtable<K,V>`

  - ### keys

    public Enumeration<K> keys()
    Overrides:
      `keys` in class `Hashtable<K,V>`

  - ### keySet

    public Set<K> keySet()
    Specified by:
      `keySet` in interface `Map<K,V>`
    Overrides:
      `keySet` in class `Hashtable<K,V>`

  - ### put

    public V put(K k, V v)
    Specified by:
      `put` in interface `Map<K,V>`
    Overrides:
      `put` in class `Hashtable<K,V>`

  - ### putAll

    public void putAll(Map<? extends K, ? extends V> m)
    Specified by:
      `putAll` in interface `Map<K,V>`
    Overrides:
      `putAll` in class `Hashtable<K,V>`

  - ### remove

    public V remove(Object k)
    Specified by:
      `remove` in interface `Map<K,V>`
    Overrides:
      `remove` in class `Hashtable<K,V>`

  - ### size

    public int size()
    Specified by:
      `size` in interface `Map<K,V>`
    Overrides:
      `size` in class `Hashtable<K,V>`

  - ### toString

    public String toString()
    Overrides:
      `toString` in class `Hashtable<K,V>`

  - ### values

    public Collection<V> values()
    Specified by:
      `values` in interface `Map<K,V>`
    Overrides:
      `values` in class `Hashtable<K,V>`