Java TreeMap get sub map by key value range

import java.util.SortedMap;
import java.util.TreeMap;

public class Main {
  public static void main(String[] args) {
    TreeMap<String, String> treeMap = new TreeMap<String, String>();

    treeMap.put("1", "CSS");
    treeMap.put("2", "HTML");
    treeMap.put("3", "Java");
    treeMap.put("4", "Javascript");
    treeMap.put("5", "SQL");    

    System.out.println(treeMap);// w  w w .  java  2s .  c  o  m
    
    SortedMap<String, String> sortedMap = treeMap.subMap("2", "5");
    System.out.println(sortedMap);
  }
}