Scala Iterator toList() method with example

The toList() method belongs to the concrete value members of the AbstractIterable class and is defined in the TraversableOnce and GenTraversableOnce classes. It converts a traversable or iterator to a list but it doesn’t terminates for infinite-sized collections.

• Method Definition:

  def toList: List[A]
  

• Return Type:
  It returns a list from the stated traversable or an iterator.>/li>

Example :

// Scala program of toList()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Declaring an iterator
        val iter = Iterator(8, 9, 10, 11)

        // Applying toList method
        val result = iter.toList

        // Displays output
        println(result)

    }
}

Output:

List(8, 9, 10, 11)

Therefore, a List is generated from an iterator.
Example :

// Scala program of toList()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Declaring an empty-iterator
        val iter = Iterator()

        // Applying toList method
        val result = iter.toList

        // Displays output
        println(result)

    }
}

Output:

List()

Therefore, an empty List is generated from an empty-iterator.