Scala TreeSet count() method with example Last Updated : 03 Nov, 2019 Summarize Comments Improve Suggest changes Share Like Article Like Report In Scala TreeSet class, the count() method is utilized to count the number of elements in the TreeSet that satisfies a given predicate. Method Definition: def count(p: (A) => Boolean): Int Return Type: It returns the count the number of elements in the TreeSet that satisfies a given predicate. Example #1: Scala // Scala program of count() // 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 count() method val result = t1.count(x => {x % 2 == 0}) // Display output print("Number of even element in the TreeSet: " + result) } } Output: TreeSet(1, 2, 3, 4, 5) Number of even element in the TreeSet: 2 Example #2: Scala // Scala program of count() // 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 count() method val result = t1.count(x => {x % 2 != 0}) // Display output print("Number of odd element in the TreeSet: " + result) } } Output: TreeSet(1, 2, 3, 4, 5) Number of odd element in the TreeSet: 3 Comment More infoAdvertise with us Next Article Scala Stack count() method with example R rupesh_rao Follow Improve Article Tags : Scala Scala Scala-Method scala-collection Similar Reads Scala Set count() method with example The count() method is utilized to count the number of elements in the set. Method Definition: def count(p: (A) => Boolean): Int Return Type: It returns the number of elements present in the set. Example #1: Scala // Scala program of count() // method // Creating object object GfG { // Main method 1 min read Scala SortedSet count() method with example The count() method is utilized to count the number of elements in the SortedSet. Method Definition: def count(p: (A) => Boolean): Int Return Type: It returns the number of elements present in the SortedSet. Example #1: Scala // Scala program of count() // method import scala.collection.immutable. 1 min read Scala Stack count() method with example In Scala Stack class, the count() method is utilized to count the number of elements in the stack that satisfies a given predicate. Method Definition: def count(p: (A) => Boolean): Int Return Type: It returns the count the number of elements in the stack that satisfies a given predicate. Example 2 min read Scala TreeSet sum() method with example The sum() method is utilized to return the sum of all the elements of the TreeSet. Method Definition: def sum: A Return Type: It returns the sum of all the elements of the TreeSet. Example #1: Scala // Scala program of sum() // method // Import TreeSet import scala.collection.mutable._ // Creating o 1 min read 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 // Scala program of ap 1 min read Scala TreeSet size() method with example The size() method is utilized to return the number of elements present in the TrreSet. Method Definition: def size: Int Return Type: It returns the number of elements present in the TreeSet. Example #1: Scala // Scala program of size() // method // Import TreeSet import scala.collection.mutable._ // 1 min read Like