Scala immutable TreeSet clear() method

In Scala immutable TreeSet class, the clear() method is utilized to delete all the elements of the TreeSet.

Method Definition: def clear(): Unit Return Type: It returns an empty TreeSet.

Example #1:

Scala

// Scala program of clear() 
// method 

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

// 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("Before clear method: " + t1) 
        
        // Applying clear() method  
        val result = t1.clear
        
        // Displays output 
        println("After clear method: " + result)
        
    } 
}

Output:

Before clear method: TreeSet(1, 2, 3, 4, 5)
After clear method: ()

Example #2:

Scala

// Scala program of clear() 
// method 

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

// 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("Before clear method: " + t1) 
        
        // Applying clear() method  
        val result = t1.clear
        
        // Displays output 
        println("After clear method: " + result)
        
    } 
}

Output:

Before clear method: TreeSet(a, e, i, o, u)
After clear method: ()

Scala immutable TreeSet clear() method

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