How to check TreeSet Empty Or not

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

public class IsEmpty {
   
    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);
           
            System.out.println("Is Empty = "+ts.isEmpty());
           
            Set<String> set = new TreeSet<String>();
           
            System.out.println("Is Empty = "+set.isEmpty());
       
        }

}



Output:

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

Is Empty = false

Is Empty = true

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