TreeMap tailMap(K fromKey boolean inclusive) method in java

import java.util.SortedMap;
import java.util.TreeMap;
public class TreeMapTailMapBooleanMethodExample
{
   public static void main(String[] args)
   {
      TreeMap<Integer, String> tm = new TreeMap<Integer, String>();
      SortedMap<Integer, String> sm = new TreeMap<Integer, String>();
      tm.put(18, "violet");
      tm.put(12, "red");
      tm.put(14, "violet");
      tm.put(16, "green");
      tm.put(20, "blue");
      System.out.println("Get tail map of TreeMap: ");
      sm = tm.tailMap(12, true);
      System.out.println("Tail map values are: " + sm);
   }
}