Java Collection - 如何从TreeMap获取Tail/Sub Map(排序的地图)

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", "One");
    treeMap.put("3", "Three");
    treeMap.put("2", "Two");
    treeMap.put("5", "Five");
    treeMap.put("4", "Four");

    SortedMap sortedMap = treeMap.tailMap("2");
    System.out.println("Tail Map Contains : " + sortedMap);
  }
}