Complete the following class with the appropriate methods shown in the rubric import java.util.HashMap; import java.util.Set; /** * Stores and manages a map of users. * * @author Java Foundations * @version 4.0 */ public class Users { privateHashMap userMap; /** * Creates a user map to track users. */ publicUsers() { userMap = newHashMap(); } /** * Adds a new user to the user map. * * @param user the user to add */ publicvoidaddUser(Useruser) { userMap.put(user.getUserId(), user); } /** * Retrieves and returns the specified user. * * @param userId the user id of the target user * @return the target user, or null if not found */ publicUsergetUser(StringuserId) { returnuserMap.get(userId); } /** * Returns a set of all user ids. * * @return a set of all user ids in the map */ publicSet getUserIds() { returnuserMap.keySet(); } }
Complete the following class with the appropriate methods shown in the rubric import java.util.HashMap; import java.util.Set; /** * Stores and manages a map of users. * * @author Java Foundations * @version 4.0 */ public class Users { privateHashMap userMap; /** * Creates a user map to track users. */ publicUsers() { userMap = newHashMap(); } /** * Adds a new user to the user map. * * @param user the user to add */ publicvoidaddUser(Useruser) { userMap.put(user.getUserId(), user); } /** * Retrieves and returns the specified user. * * @param userId the user id of the target user * @return the target user, or null if not found */ publicUsergetUser(StringuserId) { returnuserMap.get(userId); } /** * Returns a set of all user ids. * * @return a set of all user ids in the map */ publicSet getUserIds() { returnuserMap.keySet(); } }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Complete the following class with the appropriate methods shown in the rubric
import java.util.HashMap;
import java.util.Set;
/**
* Stores and manages a map of users.
*
* @author Java Foundations
* @version 4.0
*/
public class Users
{
privateHashMap<String, User> userMap;
/**
* Creates a user map to track users.
*/
publicUsers()
{
userMap = newHashMap<String, User>();
}
/**
* Adds a new user to the user map.
*
* @param user the user to add
*/
publicvoidaddUser(Useruser)
{
userMap.put(user.getUserId(), user);
}
/**
* Retrieves and returns the specified user.
*
* @param userId the user id of the target user
* @return the target user, or null if not found
*/
publicUsergetUser(StringuserId)
{
returnuserMap.get(userId);
}
/**
* Returns a set of all user ids.
*
* @return a set of all user ids in the map
*/
publicSet<String> getUserIds()
{
returnuserMap.keySet();
}
}
![HashMap Project
Documentation
Driver program and menu
Replicate the functionality demonstrated in the video lecture.
User class implementation
Successful implementation of the user class. Objects of this class adhere to the criteria demonstrated in the video demo.
Criteria
Users class implementation using hashmap
Successful implementation of the users class. Use of the hashmap class as the underlying structure.
public void removeUser(String userID)
public void addUser(User user)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbc4fa027-e5dc-410b-8122-cb02e997bf82%2F9e825f79-8fd4-4e06-adce-f8d09690485f%2Febf4meq_processed.png&w=3840&q=75)
Transcribed Image Text:HashMap Project
Documentation
Driver program and menu
Replicate the functionality demonstrated in the video lecture.
User class implementation
Successful implementation of the user class. Objects of this class adhere to the criteria demonstrated in the video demo.
Criteria
Users class implementation using hashmap
Successful implementation of the users class. Use of the hashmap class as the underlying structure.
public void removeUser(String userID)
public void addUser(User user)
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