KeyComparatorHashMap (com.github.fangjinuo.langx:langx-java:4.7.2 4.7.2 API)

java.lang.Object
- java.util.AbstractMap<K,V>
- - com.jn.langx.util.collection.KeyComparatorHashMap<K,V>

类型参数:

K - Type of keys

V - Type of values

所有已实现的接口:

Serializable, Cloneable, Map<K,V>

直接已知子类:

KeyComparatorLinkedHashMap
```
public class KeyComparatorHashMap<K,V>
extends AbstractMap<K,V>
implements Map<K,V>, Cloneable, Serializable
```
A implementation similar to HashMap but supports the comparison of keys using a KeyComparator.

另请参阅:

序列化表格

嵌套类概要
- 从类继承的嵌套类/接口 java.util.AbstractMap
  AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

构造器概要

构造器
构造器和说明
`KeyComparatorHashMap(int initialCapacity, float loadFactor, KeyComparator<K> keyComparator)` Constructs an empty `HashMap` with the specified initial capacity and load factor.
`KeyComparatorHashMap(int initialCapacity, KeyComparator<K> keyComparator)` Constructs an empty `HashMap` with the specified initial capacity and the default load factor (0.75).
`KeyComparatorHashMap(KeyComparator<K> keyComparator)` Constructs an empty `HashMap` with the default initial capacity (16) and the default load factor (0.75).
`KeyComparatorHashMap(Map<? extends K,? extends V> m, KeyComparator<K> keyComparator)` Constructs a new `HashMap` with the same mappings as the specified `Map`.

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`void`	`clear()` Removes all mappings from this map.
`Object`	`clone()` Returns a shallow copy of this `HashMap` instance: the keys and values themselves are not cloned.
`boolean`	`containsKey(Object key)` Returns `true` if this map contains a mapping for the specified key.
`boolean`	`containsValue(Object value)` Returns `true` if this map maps one or more keys to the specified value.
`Set<Map.Entry<K,V>>`	`entrySet()` Returns a collection view of the mappings contained in this map.
`V`	`get(Object 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.
`int`	`getModCount()` Get the number of times this HashMap has been structurally modified Structural modifications are those that change the number of mappings in the HashMap or otherwise modify its internal structure (e.g., rehash).
`boolean`	`isEmpty()` Returns `true` if this map contains no key-value mappings.
`V`	`put(K key, V value)` Associates the specified value with the specified key in this map.
`void`	`putAll(Map<? extends K,? extends 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.
`V`	`remove(Object key)` Removes the mapping for this key from this map if present.
`int`	`size()` Returns the number of key-value mappings in this map.

从类继承的方法 java.util.AbstractMap
equals, hashCode, keySet, toString, values

从类继承的方法 java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 java.util.Map
compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, keySet, merge, putIfAbsent, remove, replace, replace, replaceAll, values

- 构造器详细资料
  - KeyComparatorHashMap
```
public KeyComparatorHashMap(int initialCapacity,
                            float loadFactor,
                            KeyComparator<K> keyComparator)
```
    Constructs an empty HashMap with the specified initial capacity and load factor.
    
    参数:
    
    initialCapacity - The initial capacity.
    
    loadFactor - The load factor.
    
    keyComparator - the map key comparator.
    
    抛出:
    
    IllegalArgumentException - if the initial capacity is negative or the load factor is nonpositive.
  - KeyComparatorHashMap
```
public KeyComparatorHashMap(int initialCapacity,
                            KeyComparator<K> keyComparator)
```
    Constructs an empty HashMap with the specified initial capacity and the default load factor (0.75).
    
    参数:
    
    initialCapacity - the initial capacity.
    
    keyComparator - the map key comparator.
    
    抛出:
    
    IllegalArgumentException - if the initial capacity is negative.
  - KeyComparatorHashMap
```
public KeyComparatorHashMap(KeyComparator<K> keyComparator)
```
    Constructs an empty HashMap with the default initial capacity (16) and the default load factor (0.75).
    
    参数:
    
    keyComparator - the map key comparator.
  - KeyComparatorHashMap
```
public KeyComparatorHashMap(Map<? extends K,? extends V> m,
                            KeyComparator<K> keyComparator)
```
    Constructs a new HashMap with the same mappings as the specified Map. The HashMap is created with default load factor (0.75) and an initial capacity sufficient to hold the mappings in the specified Map.
    
    参数:
    
    m - the map whose mappings are to be placed in this map.
    
    keyComparator - the comparator
    
    抛出:
    
    NullPointerException - if the specified map is null.
- 方法详细资料
  - getModCount
```
public int getModCount()
```
    Get the number of times this HashMap has been structurally modified Structural modifications are those that change the number of mappings in the HashMap or otherwise modify its internal structure (e.g., rehash).
    
    返回:
    
    return the modification count.
  - size
```
public int size()
```
    Returns the number of key-value mappings in this map.
    
    指定者:
    
    size 在接口中 Map<K,V>
    
    覆盖:
    
    size 在类中 AbstractMap<K,V>
    
    返回:
    
    the number of key-value mappings in this map.
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if this map contains no key-value mappings.
    
    指定者:
    
    isEmpty 在接口中 Map<K,V>
    
    覆盖:
    
    isEmpty 在类中 AbstractMap<K,V>
    
    返回:
    
    true if this map contains no key-value mappings.
  - get
```
public V get(Object 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.
    
    指定者:
    
    get 在接口中 Map<K,V>
    
    覆盖:
    
    get 在类中 AbstractMap<K,V>
    
    参数:
    
    key - the key whose associated value is to be returned.
    
    返回:
    
    the value to which this map maps the specified key, or null if the map contains no mapping for this key.
    
    另请参阅:
    
    put(Object, Object)
  - containsKey
```
public boolean containsKey(Object key)
```
    Returns true if this map contains a mapping for the specified key.
    
    指定者:
    
    containsKey 在接口中 Map<K,V>
    
    覆盖:
    
    containsKey 在类中 AbstractMap<K,V>
    
    参数:
    
    key - The key whose presence in this map is to be tested
    
    返回:
    
    true if this map contains a mapping for the specified key.
  - put
```
public V put(K 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.
    
    指定者:
    
    put 在接口中 Map<K,V>
    
    覆盖:
    
    put 在类中 AbstractMap<K,V>
    
    参数:
    
    key - key with which the specified value is to be associated.
    
    value - value to be associated with the specified key.
    
    返回:
    
    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(Map<? extends K,? extends 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.
    
    指定者:
    
    putAll 在接口中 Map<K,V>
    
    覆盖:
    
    putAll 在类中 AbstractMap<K,V>
    
    参数:
    
    m - mappings to be stored in this map.
    
    抛出:
    
    NullPointerException - if the specified map is null.
  - remove
```
public V remove(Object key)
```
    Removes the mapping for this key from this map if present.
    
    指定者:
    
    remove 在接口中 Map<K,V>
    
    覆盖:
    
    remove 在类中 AbstractMap<K,V>
    
    参数:
    
    key - key whose mapping is to be removed from the map.
    
    返回:
    
    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.
    
    指定者:
    
    clear 在接口中 Map<K,V>
    
    覆盖:
    
    clear 在类中 AbstractMap<K,V>
  - containsValue
```
public boolean containsValue(Object value)
```
    Returns true if this map maps one or more keys to the specified value.
    
    指定者:
    
    containsValue 在接口中 Map<K,V>
    
    覆盖:
    
    containsValue 在类中 AbstractMap<K,V>
    
    参数:
    
    value - value whose presence in this map is to be tested.
    
    返回:
    
    true if this map maps one or more keys to the specified value.
  - clone
```
public Object clone()
```
    Returns a shallow copy of this HashMap instance: the keys and values themselves are not cloned.
    
    覆盖:
    
    clone 在类中 AbstractMap<K,V>
    
    返回:
    
    a shallow copy of this map.
  - entrySet
```
public Set<Map.Entry<K,V>> 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.
    
    指定者:
    
    entrySet 在接口中 Map<K,V>
    
    指定者:
    
    entrySet 在类中 AbstractMap<K,V>
    
    返回:
    
    a collection view of the mappings contained in this map.

类 KeyComparatorHashMap<K,V>

嵌套类概要

从类继承的嵌套类/接口 java.util.AbstractMap

构造器概要

方法概要

从类继承的方法 java.util.AbstractMap

从类继承的方法 java.lang.Object

从接口继承的方法 java.util.Map

构造器详细资料

KeyComparatorHashMap

KeyComparatorHashMap

KeyComparatorHashMap

KeyComparatorHashMap

方法详细资料

getModCount

size

isEmpty

get

containsKey

put

putAll

remove

clear

containsValue

clone

entrySet