HashMap is a part of Scala Collection’s. It is used to store element and return a map. A HashMap is a combination of key and value pairs which are stored using a Hash Table data structure. It provides the basic implementation of Map.
var hashMapName = HashMap("key1"->"value1", "key2"->"value2", "key3"->"value3", ...)
We must import
scala.collection.mutable.HashMap for HashMap.
Operation performed by HashMap
Creating an HashMap:
Below is the example to create HashMap. In below code, we can see an empty HashMap is created then a HashMap is created with values.
Map() Map(S -> Scala, J -> Java, C -> Csharp)
Adding and Accessing Elements :
In the below example, A HashMap is created. add elements and access elements also performed.
S -> Scala J -> Java C -> Csharp Scala S -> Scala P -> Perl J -> Java C -> Csharp
Removing an element from HashMap :
A HashMap is created than removing an element is performed using – sign. Below is the example to removing an element from HashMap.
S -> Scala J -> Java C -> Csharp After Removing S -> Scala J -> Java