Remove all values from Java TreeMap example

/*
  Remove all values from Java TreeMap example
  This Java Example shows how to remove all values from TreeMap object or empty
  TreeMap or clear TreeMap using clear method.
*/
 
import java.util.TreeMap;
 
public class EmptyTreeMapExample {
 
  public static void main(String[] args) {
 
    //create TreeMap object
    TreeMap treeMap = new TreeMap();
 
    //add key value pairs to TreeMap
    treeMap.put("1","One");
    treeMap.put("2","Two");
    treeMap.put("3","Three");
 
    /*
      To remove all values or clear TreeMap use
      void clear method() of TreeMap class. Clear method removes all
      key value pairs contained in TreeMap.
    */
 
    treeMap.clear();
 
    System.out.println("Total key value pairs in TreeMap are : " + treeMap.size());
  }
}
 
/*
Output would be
Total key value pairs in TreeMap are : 0
*/