// Importing the necessary library import java.util.UUID; // Creating a new UUID object UUID userId = UUID.randomUUID(); // Retrieving the user ID as a string String id = userId.toString(); // Printing the user ID to the console System.out.println(id); // Package library: java.util
// Creating a User class public class User { private int id; private String username; private String password; // Constructor method public User(int id, String username, String password) { this.id = id; this.username = username; this.password = password; } // Getter method for the user ID public int getId() { return id; } } // Creating a new User object User user1 = new User(1, "john_doe", "password123"); // Retrieving the user ID int userId = user1.getId(); // Printing the user ID to the console System.out.println(userId); // Package library: No specific package, belongs to the application's class hierarchy.Note: The package library for a method or class depends on the built-in or custom library used. In the first example, the package library is "java.util" which is a built-in library in Java. In the second example, there is no specific package library for the "getId" method as it belongs to the application's class hierarchy.