Scala TreeSet apply() method with example

In Scala TreeSet class, the apply() method is utilized to check if some element is present in the TreeSet or not.

Method Definition: def apply(elem: A): Boolean

Return Type: It returns true if the given element is present in the TreeSet or else returns false.

Example #1:

// Scala program of apply()
// method

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

// Creating object
object GfG
{

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

        // Creating TreeSet
        val t1 = TreeSet(2, 1, 3, 4, 5)

        // Print the TreeSet
        println(t1)

        // Applying apply() method
        val result = t1.apply(3)

        // Displays output
        println("TreeSet contains '3': " + result)

    }
}

Output:

TreeSet(1, 2, 3, 4, 5)
TreeSet contains '3': true

Example #2:

// Scala program of apply()
// method

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

// Creating object
object GfG
{

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

        // Creating TreeSet
        val t1 = TreeSet(2, 1, 3, 4, 5)

        // Print the TreeSet
        println(t1)

        // Applying apply() method
        val result = t1.apply(0)

        // Displays output
        println("TreeSet contains '0': " + result)

    }
}

Output:

TreeSet(1, 2, 3, 4, 5)
TreeSet contains '0': false