import java.util.TreeMap;
class Main {
public static void main(String[] args) {
TreeMap<String, Integer> numbers = new TreeMap<>();
numbers.put("One", 1);
numbers.put("Two", 2);
numbers.put("Three", 3);
System.out.println("TreeMap: " + numbers);
// Using entrySet()
System.out.println("Key/Value mappings: " + numbers.entrySet());
// Using keySet()
System.out.println("Keys: " + numbers.keySet());
// Using values()
System.out.println("Values: " + numbers.values());
}
}