import java.util.SortedMap;
import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap treeMap = new TreeMap();
treeMap.put("1", "One");
treeMap.put("3", "Three");
treeMap.put("2", "Two");
treeMap.put("5", "Five");
treeMap.put("4", "Four");
SortedMap sortedMap = treeMap.headMap("3");
System.out.println("Head Map Contains : " + sortedMap);
}
}