TreeSet size() Method in Java
The Java.util.TreeSet.size() method is used to get the size of the Tree set or the number of elements present in the Tree set.
Syntax:
Tree_Set.size()
Parameters: The method does not take any parameter.
Return Value: The method returns the size or the number of elements present in the Set.
Below program illustrates the use of Java.util.TreeSet.size() method:
// Java code to illustrate size()import java.util.*;import java.util.TreeSet; public class TreeSetDemo { public static void main(String args[]) { // Creating an empty TreeSet TreeSet<String> tree = new TreeSet<String>(); // Use add() method to add elements into the Set tree.add("Welcome"); tree.add("To"); tree.add("Geeks"); tree.add("4"); tree.add("Geeks"); tree.add("TreeSet"); // Displaying the TreeSet System.out.println("TreeSet: " + tree); // Displaying the size of the set System.out.println("The size of the set is: " + tree.size()); }} |
Output:
TreeSet: [4, Geeks, To, TreeSet, Welcome] The size of the set is: 5
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