void clear()

// Java code to illustrate clear()
  
import java.io.*;
import java.util.*;
  
public class SetDemo {
    public static void main(String args[])
    {
        // Creating an empty Set
        SortedSet<String> st
            = new TreeSet<String>();
  
        // Use add() method to
        // add elements into the Set
        st.add("Welcome");
        st.add("To");
        st.add("Geeks");
        st.add("4");
        st.add("Geeks");
  
        // Displaying the Set
        System.out.println("Initial Set: " + st);
  
        // Clearing the Set using clear() method
        st.clear();
  
        // Displaying the final Set after clearing;
        System.out.println("The final set: " + st);
    }
}

Initial Set: [4, Geeks, To, Welcome]
The final set: []