Module javafx.base
Package javafx.collections

## Interface ObservableMap<K,​V>

- All Superinterfaces:
    `Map<K,​V>`, `Observable`
  All Known Subinterfaces:
    `ObservableMapValue<K,​V>`, `WritableMapValue<K,​V>`
  All Known Implementing Classes:
    `MapBinding`, `MapExpression`, `MapProperty`, `MapPropertyBase`, `ReadOnlyMapProperty`, `ReadOnlyMapPropertyBase`, `ReadOnlyMapWrapper`, `SimpleMapProperty`

      public interface ObservableMap<K,​V>
      extends Map<K,​V>, Observable

  A map that allows observers to track changes when they occur.
  Since:
    JavaFX 2.0
  See Also:
    `MapChangeListener`, `MapChangeListener.Change`

- - ### Nested Class Summary

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

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

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `addListener​(MapChangeListener<? super K,​? super V> listener)` | Add a listener to this observable map.
    `void` | `removeListener​(MapChangeListener<? super K,​? super V> listener)` | Tries to removed a listener from this observable map.

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

      `clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values`

    - ### Methods inherited from interface javafx.beans.Observable

      `addListener, removeListener`

- - ### Method Detail

    - #### addListener

          void addListener​(MapChangeListener<? super K,​? super V> listener)

      Add a listener to this observable map.
      Parameters:
        `listener` - the listener for listening to the list changes

    - #### removeListener

          void removeListener​(MapChangeListener<? super K,​? super V> listener)

      Tries to removed a listener from this observable map. If the listener is not attached to this map, nothing happens.
      Parameters:
        `listener` - a listener to remove