How to count number of element in TreeSet

import java.util.Set;
import java.util.TreeSet;

public class CountElement {
   
    public static void main(String[] args) {
       
           Set<String> ts = new TreeSet<String>();
            ts.add("mumbai");
            ts.add("delhi");
            ts.add("kolkata");
            ts.add("chandigarh");
            ts.add("dehradun");

            // print treeset
            System.out.println(" ts ="+ts);
           
            /*
             * Returns the number of elements in this set (its
                cardinality). If this set contains more than
                Integer.MAX_VALUE elements, returns
                Integer.MAX_VALUE.
             */
           
            System.out.println("Size of treeset = "+ts.size());
       
        }

}



Output:

 ts =[chandigarh, dehradun, delhi, kolkata, mumbai]

Size of treeset = 5

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