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/Kotlin

HashMap

typealias HashMap<K, V> = HashMap<K, V>

Platform and version requirements: Kotlin 1.1, JVM

open class HashMap<K, V> : AbstractMutableMap<K, V>

Platform and version requirements: JS

Hash table based implementation of the MutableMap interface.

This implementation makes no guarantees regarding the order of enumeration of keys, values and entries collections.

HashMap()

HashMap(initialCapacity: Int, loadFactor: Float = 0f)

Constructs an empty HashMap instance.

HashMap(original: Map<out K, V>)

Constructs an instance of HashMap filled with the contents of the specified original map.

open val entries: MutableSet<MutableEntry<K, V>>

Returns a read-only Set of all key/value pairs in this map.

open val size: Int

Returns the number of key/value pairs in the map.

open val keys: MutableSet<K>

Returns a read-only Set of all keys in this map.

open val values: MutableCollection<V>

Returns a read-only Collection of all values in this map. Note that this collection may contain duplicate values.

clear	open fun clear() Removes all elements from this map.
containsKey	open fun containsKey(key: K): Boolean Returns `true` if the map contains the specified key.
containsValue	open fun containsValue(value: V): Boolean Returns `true` if the map maps one or more keys to the specified value.
createEntrySet	open fun createEntrySet(): MutableSet<MutableEntry<K, V>>
get	open operator fun get(key: K): V? Returns the value corresponding to the given key, or `null` if such a key is not present in the map.
put	open fun put(key: K, value: V): V? Associates the specified value with the specified key in the map.
remove	open fun remove(key: K): V? Removes the specified key and its corresponding value from this map.

open fun putAll(from: Map<out K, V>)

Updates this map with key/value pairs from the specified map from.