Class IntHashMap<V>

java.lang.Object
org.apache.wicket.util.collections.IntHashMap<V>
Type Parameters:
V - The value in the map
All Implemented Interfaces:
Serializable, Cloneable

public class IntHashMap<V> extends Object implements Cloneable, Serializable
This is an integer hashmap that has the exact same features and interface as a normal Map except that the key is directly an integer. So no hash is calculated or key object is stored.
Author:
jcompagner
See Also:
  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static class 
     
  • Constructor Summary

    Constructors
    Constructor
    Description
    Constructs an empty HashMap with the default initial capacity (16) and the default load factor (0.75).
    IntHashMap(int initialCapacity)
    Constructs an empty HashMap with the specified initial capacity and the default load factor (0.75).
    IntHashMap(int initialCapacity, float loadFactor)
    Constructs an empty HashMap with the specified initial capacity and load factor.
  • Method Summary

    Modifier and Type
    Method
    Description
    void
    Removes all mappings from this map.
    Returns a shallow copy of this HashMap instance: the keys and values themselves are not cloned.
    boolean
    containsKey(int key)
    Returns true if this map contains a mapping for the specified key.
    boolean
    Returns true if this map maps one or more keys to the specified value.
    Returns a collection view of the mappings contained in this map.
    get(int key)
    Returns the value to which the specified key is mapped in this identity hash map, or null if the map contains no mapping for this key.
    boolean
    Returns true if this map contains no key-value mappings.
    Returns a set view of the keys contained in this map.
    put(int key, V value)
    Associates the specified value with the specified key in this map.
    void
    Copies all of the mappings from the specified map to this map These mappings will replace any mappings that this map had for any of the keys currently in the specified map.
    remove(int key)
    Removes the mapping for this key from this map if present.
    int
    Returns the number of key-value mappings in this map.
    Returns a collection view of the values contained in this map.

    Methods inherited from class java.lang.Object

    equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • IntHashMap

      public IntHashMap(int initialCapacity, float loadFactor)
      Constructs an empty HashMap with the specified initial capacity and load factor.
      Parameters:
      initialCapacity - The initial capacity.
      loadFactor - The load factor.
      Throws:
      IllegalArgumentException - if the initial capacity is negative or the load factor is nonpositive.
    • IntHashMap

      public IntHashMap(int initialCapacity)
      Constructs an empty HashMap with the specified initial capacity and the default load factor (0.75).
      Parameters:
      initialCapacity - the initial capacity.
      Throws:
      IllegalArgumentException - if the initial capacity is negative.
    • IntHashMap

      public IntHashMap()
      Constructs an empty HashMap with the default initial capacity (16) and the default load factor (0.75).
  • Method Details

    • size

      public int size()
      Returns the number of key-value mappings in this map.
      Returns:
      the number of key-value mappings in this map.
    • isEmpty

      public boolean isEmpty()
      Returns true if this map contains no key-value mappings.
      Returns:
      true if this map contains no key-value mappings.
    • get

      public V get(int key)
      Returns the value to which the specified key is mapped in this identity hash map, or null if the map contains no mapping for this key. A return value of null does not necessarily indicate that the map contains no mapping for the key; it is also possible that the map explicitly maps the key to null. The containsKey method may be used to distinguish these two cases.
      Parameters:
      key - the key whose associated value is to be returned.
      Returns:
      the value to which this map maps the specified key, or null if the map contains no mapping for this key.
      See Also:
    • containsKey

      public boolean containsKey(int key)
      Returns true if this map contains a mapping for the specified key.
      Parameters:
      key - The key whose presence in this map is to be tested
      Returns:
      true if this map contains a mapping for the specified key.
    • put

      public V put(int key, V value)
      Associates the specified value with the specified key in this map. If the map previously contained a mapping for this key, the old value is replaced.
      Parameters:
      key - key with which the specified value is to be associated.
      value - value to be associated with the specified key.
      Returns:
      previous value associated with specified key, or null if there was no mapping for key. A null return can also indicate that the HashMap previously associated null with the specified key.
    • putAll

      public void putAll(IntHashMap<V> m)
      Copies all of the mappings from the specified map to this map These mappings will replace any mappings that this map had for any of the keys currently in the specified map.
      Parameters:
      m - mappings to be stored in this map.
      Throws:
      NullPointerException - if the specified map is null.
    • remove

      public V remove(int key)
      Removes the mapping for this key from this map if present.
      Parameters:
      key - key whose mapping is to be removed from the map.
      Returns:
      previous value associated with specified key, or null if there was no mapping for key. A null return can also indicate that the map previously associated null with the specified key.
    • clear

      public void clear()
      Removes all mappings from this map.
    • containsValue

      public boolean containsValue(Object value)
      Returns true if this map maps one or more keys to the specified value.
      Parameters:
      value - value whose presence in this map is to be tested.
      Returns:
      true if this map maps one or more keys to the specified value.
    • clone

      Returns a shallow copy of this HashMap instance: the keys and values themselves are not cloned.
      Overrides:
      clone in class Object
      Returns:
      a shallow copy of this map.
      Throws:
      CloneNotSupportedException
    • keySet

      public Set<Integer> keySet()
      Returns a set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from this map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.
      Returns:
      a set view of the keys contained in this map.
    • values

      public Collection<V> values()
      Returns a collection view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. The collection supports element removal, which removes the corresponding mapping from this map, via the Iterator.remove, Collection.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.
      Returns:
      a collection view of the values contained in this map.
    • entrySet

      Returns a collection view of the mappings contained in this map. Each element in the returned collection is a Map.Entry. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. The collection supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Collection.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.
      Returns:
      a collection view of the mappings contained in this map.
      See Also: