Scala TreeSet head() method with example

The head() method is utilized to return the first element of the TreeSet.

Method Definition: def head: A

Return Type: It returns the first element of the TreeSet.

Example #1:

// Scala program of head()
// method

// Import TreeSet
import scala.collection.mutable._

// Creating object
object GfG
{

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

        // Creating TreeSet
        val t1 = TreeSet(1, 3, 2, 7, 6, 5)

        // Print the TreeSet
        println(t1)

        // Applying head() method
        val result = t1.head

        // Displays output
        println("First element of the TreeSet: " + result)

    }
}

Output:

TreeSet(1, 2, 3, 5, 6, 7)
First element of the TreeSet: 1

Example #2:

// Scala program of head()
// method

// Import TreeSet
import scala.collection.mutable._

// Creating object
object GfG
{

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

        // Creating TreeSet
        val t1 = TreeSet("a", "e", "i", "o", "u")

        // Print the TreeSet
        println(t1)

        // Applying head() method
        val result = t1.head

        // Displays output
        println("First element of the TreeSet: " + result)

    }
}

Output:

TreeSet(a, e, i, o, u)
First element of the TreeSet: a