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 tMap = new TreeMap();

  // add key value pairs to TreeMap
  tMap.put("1", "One");
  tMap.put("2", "Two");
  tMap.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.
   **/

  tMap.clear();

  System.out.println("Total key value pairs in TreeMap are : "
    + tMap.size());
 }
}

The output is:


Total key value pairs in TreeMap are : 0