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

Next TopicScala ListMap

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