Scala HashMap

by Online Tutorials Library July 14, 2022

Scala HashMap

HashMap is used to store element. It use hash code to store elements and return a map.

HashMap Example

In this example, we have created a HashMap.

  import scala.collection.immutable._  object MainObject{      def main(args:Array[String]){          var hashMap = new HashMap()          var hashMap2 = HashMap(“A”->”Apple”,”B”->”Ball”,”C”->”Cat”)          println(hashMap)          println(hashMap2)      }  }  

Output:

Map()  Map(A -> Apple, B -> Ball, C -> Cat)

Scala HashMap Example: Adding and Accessing Elements

In the following example, we have created a HashMap. this program add elements and access elements as well.

  import scala.collection.immutable._  object MainObject{      def main(args:Array[String]){          var hashMap = HashMap(“A”->”Apple”,”B”->”Ball”,”C”->”Cat”)          hashMap.foreach {              case (key, value) => println (key + ” -> ” + value)// Iterating elements          }          println(hashMap(“B”))// Accessing value by using key          var newHashMap = hashMap+(“D”->”Doll”)          newHashMap.foreach {              case (key, value) => println (key + ” -> ” + value)          }                }  }  

Output:

A -> Apple  B -> Ball  C -> Cat  Ball  A -> Apple  B -> Ball  C -> Cat  D -> Doll

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