import java.util.TreeMap;
public class ProductDB {
public static void main(String[] args) {
TreeMap db = new TreeMap();
db.put(1000, new Product("D", 350));
db.put(1011, new Product("p", 15.75));
db.put(1102, new Product("M", 8.50));
db.put(2023, new Product("A", 150));
db.put(2034, new Product("T", 9.99));
System.out.println(db.subMap(1000, 1999) + "\n");
System.out.println(db.tailMap(1011) + "\n");
System.out.println(db.headMap(2023));
System.out.println("First key higher than 2034: " + db.higherKey(2034));
System.out.println("First key lower than 2034: " + db.lowerKey(2034));
}
}
class Product {
String desc;
double price;
Product(String desc, double price) {
this.desc = desc;
this.price = price;
}
public String toString() {
return "Description=" + desc + ", Price=" + price;
}
}