How to remove all element from TreeSet

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

public class RemoveAll {
   
    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(" Before Clear TreeSet is ="+ts);
           
            /*
             * Removes all of the elements from  set
             */
            ts.clear();
           
            System.out.println(" After Clear Treeset is = "+ts);
       
        }

}

Output:

Before Clear TreeSet is =[chandigarh, dehradun, delhi, kolkata, mumbai]

After Clear Treeset is = []

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