JAVA

Sample NavigableMap

import java.util.NavigableMap;
import java.util.TreeMap;

class Main {

    public static void main(String[] args) {
        // Creating NavigableMap using TreeMap
        NavigableMap<String, Integer> numbers = new TreeMap<>();

        // Insert elements to map
        numbers.put("Two", 2);
        numbers.put("One", 1);
        numbers.put("Three", 3);
        System.out.println("NavigableMap: " + numbers);

        // Access the first entry of the map
        System.out.println("First Entry: " + numbers.firstEntry());

        // Access the last entry of the map
        System.out.println("Last Entry: " + numbers.lastEntry());

        // Remove the first entry from the map
        System.out.println("Removed First Entry: " + numbers.pollFirstEntry());

        // Remove the last entry from the map
        System.out.println("Removed Last Entry: " + numbers.pollLastEntry());
    }
}