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Scala TreeSet head() method with example
  • Last Updated : 02 Nov, 2019

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



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