Map
A collection that holds pairs of objects (keys and values) and supports efficiently retrieving the value corresponding to each key. Map keys are unique; the map holds only one value for each key. Methods in this interface support only read-only access to the map; read-write access is supported through the MutableMap interface.
A collection that holds pairs of objects (keys and values) and supports efficiently retrieving the value corresponding to each key. Map keys are unique; the map holds only one value for each key. Methods in this interface support only read-only access to the map; read-write access is supported through the MutableMap interface.
A collection that holds pairs of objects (keys and values) and supports efficiently retrieving the value corresponding to each key. Map keys are unique; the map holds only one value for each key. Methods in this interface support only read-only access to the map; read-write access is supported through the MutableMap interface.
A collection that holds pairs of objects (keys and values) and supports efficiently retrieving the value corresponding to each key. Map keys are unique; the map holds only one value for each key. Methods in this interface support only read-only access to the map; read-write access is supported through the MutableMap interface.
Parameters
the type of map keys. The map is invariant in its key type, as it can accept key as a parameter (of containsKey for example) and return it in keys set.
the type of map values. The map is covariant in its value type.
the type of map keys. The map is invariant in its key type, as it can accept key as a parameter (of containsKey for example) and return it in keys set.
the type of map values. The map is covariant in its value type.
the type of map keys. The map is invariant in its key type, as it can accept key as a parameter (of containsKey for example) and return it in keys set.
the type of map values. The map is covariant in its value type.
the type of map keys. The map is invariant in its key type, as it can accept key as a parameter (of containsKey for example) and return it in keys set.
the type of map values. The map is covariant in its value type.
Types
Functions
Returns the value corresponding to the given key, or defaultValue if such a key is not present in the map.
Returns the value corresponding to the given key, or defaultValue if such a key is not present in the map.
Returns the value corresponding to the given key, or defaultValue if such a key is not present in the map.
Returns true if the map is empty (contains no elements), false otherwise.
Returns true if the map is empty (contains no elements), false otherwise.
Returns true if the map is empty (contains no elements), false otherwise.
Properties
Returns a read-only Collection of all values in this map. Note that this collection may contain duplicate values.
Returns a read-only Collection of all values in this map. Note that this collection may contain duplicate values.
Returns a read-only Collection of all values in this map. Note that this collection may contain duplicate values.
Returns a read-only Collection of all values in this map. Note that this collection may contain duplicate values.
Inheritors
Extensions
Returns true if all entries match the given predicate.
Returns true if map has at least one entry.
Returns true if at least one entry matches the given predicate.
Creates an Iterable instance that wraps the original map returning its entries when being iterated.
Creates a Sequence instance that wraps the original map returning its entries when being iterated.
Checks if the map contains the given key.
Returns true if the map maps one or more keys to the specified value.
Returns the number of entries in this map.
Returns the number of entries matching the given predicate.
Returns a new map containing all key-value pairs matching the given predicate.
Returns a map containing all key-value pairs with keys matching the given predicate.
Returns a new map containing all key-value pairs not matching the given predicate.
Appends all entries not matching the given predicate into the given destination.
Appends all entries matching the given predicate into the mutable map given as destination parameter.
Returns a map containing all key-value pairs with values matching the given predicate.
Returns the first non-null value produced by transform function being applied to entries of this map in iteration order, or throws NoSuchElementException if no non-null value was produced.
Returns the first non-null value produced by transform function being applied to entries of this map in iteration order, or null if no non-null value was produced.
Returns a single list of all elements yielded from results of transform function being invoked on each entry of original map.
Appends all elements yielded from results of transform function being invoked on each entry of original map, to the given destination.
Performs the given action on each entry.
Returns the value corresponding to the given key, or null if such a key is not present in the map.
Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
Returns the value for the given key, or the result of the defaultValue function if there was no entry for the given key.
Returns the value of the property for the given object from this read-only map.
Returns the value for the given key or throws an exception if there is no such key in the map.
Returns a list containing the results of applying the given transform function to each entry in the original map.
Populates the given destination map with entries having the keys obtained by applying the transform function to each entry in this Map and the values of this map.
Returns a list containing only the non-null results of applying the given transform function to each entry in the original map.
Applies the given transform function to each entry in the original map and appends only the non-null results to the given destination.
Applies the given transform function to each entry of the original map and appends the results to the given destination.
Populates the given destination map with entries having the keys of this map and the values obtained by applying the transform function to each entry in this Map.
Returns the first entry yielding the largest value of the given function or null if there are no entries.
Returns the largest value among all values produced by selector function applied to each entry in the map.
Returns the largest value among all values produced by selector function applied to each entry in the map or null if there are no entries.
Returns the largest value according to the provided comparator among all values produced by selector function applied to each entry in the map.
Returns the largest value according to the provided comparator among all values produced by selector function applied to each entry in the map or null if there are no entries.
Returns the first entry having the largest value according to the provided comparator or null if there are no entries.
Returns the first entry yielding the smallest value of the given function or null if there are no entries.
Returns the smallest value among all values produced by selector function applied to each entry in the map.
Returns the smallest value among all values produced by selector function applied to each entry in the map or null if there are no entries.
Returns the smallest value according to the provided comparator among all values produced by selector function applied to each entry in the map.
Returns the smallest value according to the provided comparator among all values produced by selector function applied to each entry in the map or null if there are no entries.
Returns a map containing all entries of the original map except the entry with the given key.
Returns a map containing all entries of the original map except those entries the keys of which are contained in the given keys collection.
Returns a map containing all entries of the original map except those entries the keys of which are contained in the given keys array.
Returns a map containing all entries of the original map except those entries the keys of which are contained in the given keys sequence.
Returns the first entry having the smallest value according to the provided comparator or null if there are no entries.
Returns true if the map has no entries.
Returns true if no entries match the given predicate.
Creates a new read-only map by replacing or adding an entry to this map from a given key-value pair.
Creates a new read-only map by replacing or adding entries to this map from a given collection of key-value pairs.
Creates a new read-only map by replacing or adding entries to this map from a given array of key-value pairs.
Creates a new read-only map by replacing or adding entries to this map from a given sequence of key-value pairs.
Creates a new read-only map by replacing or adding entries to this map from another map.
Returns a new read-only map containing all key-value pairs from the original map.
Populates and returns the destination mutable map with key-value pairs from the given map.
Returns a new mutable map containing all key-value pairs from the original map.
Converts this Map to a Properties object.
Converts this Map to a SortedMap. The resulting SortedMap determines the equality and order of keys according to their natural sorting order.
Converts this Map to a SortedMap. The resulting SortedMap determines the equality and order of keys according to the sorting order provided by the given comparator.
Returns a wrapper of this read-only map, having the implicit default value provided with the specified function defaultValue.