Clone a map in Java

/* www  . jav a  2  s.  c o m*/
import java.util.HashMap;
import java.util.Map;


public class Main {
  /**
   * Clones a map.
   *
   * @param source the source map
   * @return the clone of the source map
   */
  public static Map copy(Map source) {

      if(source == null) {
          return null;
      }

      Map result = new HashMap();
      result.putAll(source);
      return result;
  }

}