import java.util.*;

public class SortedMapExample {

	public static void main(String[] args) {

		SortedMap map = new TreeMap();

		// Add some elements:
		map.put("2", "Two");
		map.put("1", "One");
		map.put("5", "Five");
		map.put("4", "Four");
		map.put("3", "Three");

		// Display the lowest key:
		System.out.println("The lowest key value is: " + map.firstKey());

		// Display the highest key:
		System.out.println("The highest key value is: " + map.lastKey());

		// Display All key value
		System.out.println("All key value is:\n" + map);

		// Display the headMap:
		System.out.println("The head map is:\n" + map.headMap("4"));

		// Display the tailMap:
		System.out.println("The tail map is:\n" + map.tailMap("4"));

		// keySet method returns a Set view of the keys contained in this map.
		Iterator iterator = map.keySet().iterator();
		while (iterator.hasNext()) {
			Object key = iterator.next();
			System.out.println("key : " + key + " value :" + map.get(key));
		}
	}
}