Package org.apache.tomcat.util.collections

## Class CaseInsensitiveKeyMap<V>

- java.lang.Object
- - java.util.AbstractMap<java.lang.String,​V>
  - - org.apache.tomcat.util.collections.CaseInsensitiveKeyMap<V>

- Type Parameters:
    `V` - Type of values placed in this Map.
  All Implemented Interfaces:
    `java.util.Map<java.lang.String,​V>`

      public class CaseInsensitiveKeyMap<V>
      extends java.util.AbstractMap<java.lang.String,​V>

  A Map implementation that uses case-insensitive (using `Locale.ENGLISH`) strings as keys.

  Keys must be instances of `String`. Note that this means that `null` keys are not permitted.

  This implementation is not thread-safe.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class java.util.AbstractMap

      `java.util.AbstractMap.SimpleEntry<K extends java.lang.Object,​V extends java.lang.Object>, java.util.AbstractMap.SimpleImmutableEntry<K extends java.lang.Object,​V extends java.lang.Object>`

    - ### Nested classes/interfaces inherited from interface java.util.Map

      `java.util.Map.Entry<K extends java.lang.Object,​V extends java.lang.Object>`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `CaseInsensitiveKeyMap()` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `containsKey​(java.lang.Object key)` |
    `java.util.Set<java.util.Map.Entry<java.lang.String,​V>>` | `entrySet()` |
    `V` | `get​(java.lang.Object key)` |
    `V` | `put​(java.lang.String key, V value)` |
    `void` | `putAll​(java.util.Map<? extends java.lang.String,​? extends V> m)`
    `V` | `remove​(java.lang.Object key)` |

    - ### Methods inherited from class java.util.AbstractMap

      `clear, clone, containsValue, equals, hashCode, isEmpty, keySet, size, toString, values`

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface java.util.Map

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

- - ### Constructor Detail

    - #### CaseInsensitiveKeyMap

          public CaseInsensitiveKeyMap()

  - ### Method Detail

    - #### get

          public V get​(java.lang.Object key)

      Specified by:
        `get` in interface `java.util.Map<java.lang.String,​V>`
      Overrides:
        `get` in class `java.util.AbstractMap<java.lang.String,​V>`

    - #### put

          public V put​(java.lang.String key,
                       V value)

      Specified by:
        `put` in interface `java.util.Map<java.lang.String,​V>`
      Overrides:
        `put` in class `java.util.AbstractMap<java.lang.String,​V>`

    - #### putAll

          public void putAll​(java.util.Map<? extends java.lang.String,​? extends V> m)

      Use this method with caution. If the input Map contains duplicate keys when the keys are compared in a case insensitive manner then some values will be lost when inserting via this method.

      Specified by:
        `putAll` in interface `java.util.Map<java.lang.String,​V>`
      Overrides:
        `putAll` in class `java.util.AbstractMap<java.lang.String,​V>`

    - #### containsKey

          public boolean containsKey​(java.lang.Object key)

      Specified by:
        `containsKey` in interface `java.util.Map<java.lang.String,​V>`
      Overrides:
        `containsKey` in class `java.util.AbstractMap<java.lang.String,​V>`

    - #### remove

          public V remove​(java.lang.Object key)

      Specified by:
        `remove` in interface `java.util.Map<java.lang.String,​V>`
      Overrides:
        `remove` in class `java.util.AbstractMap<java.lang.String,​V>`

    - #### entrySet

          public java.util.Set<java.util.Map.Entry<java.lang.String,​V>> entrySet()

      Specified by:
        `entrySet` in interface `java.util.Map<java.lang.String,​V>`
      Specified by:
        `entrySet` in class `java.util.AbstractMap<java.lang.String,​V>`