Goal: This is a comprehensive project to leverage some major topics we have lear

Question

Goal: This is a comprehensive project to leverage some major topics we have learned in this class.  It is designed to help you understand OO design, Java collections, properties files, internationalization, and data persistence using JDBC in a fun setting.

Description: Frequently seen in the technology industry, your colleague John Smith just left your company for a better opportunity. All of John's work is in a Zip file attached with this assignment(files' code below).  You are asked to finish his project, "MatchMaker" and make a few improvements on it. MatchMaker is a stand-alone command-line based Java application with a console dialog menu. It uses a simple tab-delimited text file to save member profiles. This application allows its users to register, login, view member profiles, and find the best match based on a proprietary algorithm. Here is what you need to do:

(1) Complete the functionality of "Find the best match" that John has left.

Hints: The following hints may help you with this assignment.
Item #1: Review List collection we learned in Unit 07.

---Member.java-----

---- MenuHelper.java-----

-----------------------------------------------------------

------Utils.java-------

-------------------------------------------------

----- AppConstants.java----

---------------------------------------------------------

----------MatchMaker.java----------

------------------------------------------------

--------MatchMakerMain------------

Explanation / Answer

Given below is the completed code for the MatchMaker.java Use it with other files
To indent code in eclipse , select code by pressing ctrl+a and then indent using ctrl+i
Please do rate the answer if it was helpful. Thank you

MatchMaker.java
----------------

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Scanner;

public class MatchMaker {

private ArrayList members;
private Member currentMember;
private Scanner keyboard = new Scanner(System.in);

public MatchMaker() {
members = new ArrayList();
currentMember = null;
}

public void start() {
loadData();
homeMenuHandler();
}

private void logout() {
saveData();
MenuHelper.printExitScreen();
}

private void loadData() {
BufferedReader inputStream = null;
  
try {
inputStream =
new BufferedReader(new FileReader(AppConstants.DATA_FILE));

String line = inputStream.readLine( );
while (line != null) {
String[] data = line.split(" ");
Member m = new Member();
m.setUserId(data[0]);
m.setPassword(data[1]);
m.setEmail(data[2]);
m.setAge(Integer.parseInt(data[3]));
m.setGender(data[4]);
m.setReading(Integer.parseInt(data[5]));
m.setEating(Integer.parseInt(data[6]));
m.setSporting(Integer.parseInt(data[7]));
m.setTraveling(Integer.parseInt(data[8]));
m.setMusic(Integer.parseInt(data[9]));
members.add(m);
line = inputStream.readLine( );
}

inputStream.close();
} catch (FileNotFoundException e) {
System.out.println("File not found: " + AppConstants.DATA_FILE);
e.printStackTrace();
} catch (IOException e) {
System.out.println("IO Exception");
e.printStackTrace();
} finally {
//Close the input and output stream.
//Otherwise the next time this program may not run properly.
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

private void saveData() {
if (members != null && members.size() != 0) {
PrintWriter outputStream = null;
try {
outputStream =
new PrintWriter(new FileOutputStream(AppConstants.DATA_FILE));
  
for (int i = 0; i < members.size(); i++) {
Member m = members.get(i);
outputStream.println(
m.getUserId() + " " +
m.getPassword() + " " +
m.getEmail() + " " +
m.getAge() + " " +
m.getGender() + " " +
m.getReading() + " " +
m.getEating() + " " +
m.getSporting() + " " +
m.getTraveling() + " " +
m.getMusic());
}
outputStream.close();
} catch (FileNotFoundException e) {
System.out.println("File not found: " + AppConstants.DATA_FILE);
e.printStackTrace();
} finally {
//Close the input and output stream.
//Otherwise the next time this program may not run properly.
if (outputStream != null) {
outputStream.close();
}
}
}
}

private void login() {
MenuHelper.printLoginMenu();
System.out.println("Enter username: ");
String username = keyboard.nextLine();
System.out.println("Enter password: ");
String password = keyboard.nextLine();
for (int i = 0; i < members.size(); i++) {
Member m = members.get(i);
if (m.getUserId().equals(username)
&& m.getPassword().equals(password)) {
currentMember = m;
break;
}
}
  
if (currentMember == null) {
System.out.println("Invalid username/password!");
login();
} else {
mainMenuHandler();
}
  
  
}

private void homeMenuHandler() {
MenuHelper.printHomeMenu();
System.out.println("Please select a choice: ");
String choice = keyboard.nextLine();
char c = choice.charAt(0); //only take the first character
switch (c) {
case '1': login();
break;
case '2': register();
break;
case '0': logout();
break;
default: System.out.println("Invalid choice!");
homeMenuHandler();
}
  
}

private void mainMenuHandler() {
MenuHelper.printMainMenu();
System.out.println("Please select a choice: ");
String choice = keyboard.nextLine();
char c = choice.charAt(0); //only take the first character
switch (c) {
case '1': updateProfile();
break;
case '2': viewMembers();
break;
case '3': viewBestMatch();
break;
case '0': logout();
break;
default: System.out.println("Invalid choice!");
mainMenuHandler();
}

}

private void register() {
System.out.println("Please fill the follwoing info: ");
System.out.println("--------------------------------");
System.out.println("User ID: (max 10 characters) ");
String userId = keyboard.nextLine();
if (userExists(userId)) {
System.out.println("User ID already exists. Please choose another one.");
register();
} else {   
System.out.println("Password: (max 10 characters) ");
String password = keyboard.nextLine();
System.out.println("Email address: ");
String email = keyboard.nextLine();
System.out.println("Age: ");
String ageStr = keyboard.nextLine();
int age = Integer.parseInt(ageStr);
System.out.println("Gender: ('F' or 'M') ");
String gender = keyboard.nextLine();
System.out.println();
System.out.println("Tell us about your personality.");
System.out.println("Between 0 (least) to 10 (most), give a score to the following: ");
System.out.println("-------------------------------------------------------------");
System.out.println("Love to read: ");
int read = Integer.parseInt(keyboard.nextLine());
System.out.println("Love to eat: ");
int eat = Integer.parseInt(keyboard.nextLine());
System.out.println("Love to do sport: ");
int sport = Integer.parseInt(keyboard.nextLine());
System.out.println("Love to travel: ");
int travel = Integer.parseInt(keyboard.nextLine());
System.out.println("Love music: ");
int music = Integer.parseInt(keyboard.nextLine());



Member m = new Member();
m.setUserId(userId);
m.setPassword(password);
m.setAge(age);
m.setEmail(email);
m.setGender(gender);
m.setEating(eat);
m.setReading(read);
m.setSporting(sport);
m.setTraveling(travel);
m.setMusic(music);

members.add(m);
System.out.println("Congratulations! You are a member of the Match Maker community.");
login();
}
}

private void updateProfile() {
System.out.println("Password: (max 8 characters) ");
String password = keyboard.nextLine();
System.out.println("Email address: ");
String email = keyboard.nextLine();
System.out.println("Age: ");
String ageStr = keyboard.nextLine();
int age = Integer.parseInt(ageStr);
System.out.println("Gender: ('F' or 'M') ");
String gender = keyboard.nextLine();
System.out.println();
System.out.println("Tell us about your personality.");
System.out.println("Between 0 (least) to 10 (most), give a score to the following: ");
System.out.println("-------------------------------------------------------------");
System.out.println("Love to read: ");
int read = Integer.parseInt(keyboard.nextLine());
System.out.println("Love to eat: ");
int eat = Integer.parseInt(keyboard.nextLine());
System.out.println("Love to do sport: ");
int sport = Integer.parseInt(keyboard.nextLine());
System.out.println("Love to travel: ");
int travel = Integer.parseInt(keyboard.nextLine());
System.out.println("Love music: ");
int music = Integer.parseInt(keyboard.nextLine());

currentMember.setPassword(password);
currentMember.setAge(age);
currentMember.setEmail(email);
currentMember.setGender(gender);
currentMember.setEating(eat);
currentMember.setReading(read);
currentMember.setSporting(sport);
currentMember.setTraveling(travel);
currentMember.setMusic(music);
  
System.out.println("Thank you! Your profile has been updated.");
mainMenuHandler();
}

private void viewMembers() {
System.out.println("**************************************** Member Profiles ******************************************");
System.out.println();
System.out.println("Username Email Age Gender Reading Eating Sporting Traveling Music");
System.out.println("=============== ======================================== === ====== ======= ====== ======== ========= =====");
  
for (int i = 0; i < members.size(); i++) {
Member m = members.get(i);
System.out.println(Utils.rpad(m.getUserId(), ' ', 15) + " " +
Utils.rpad(m.getEmail(), ' ', 40) + " " +
Utils.rpad(Integer.toString(m.getAge()), ' ', 3) + " " +
Utils.rpad(m.getGender(), ' ', 6) + " " +
Utils.rpad(Integer.toString(m.getReading()), ' ', 7) + " " +
Utils.rpad(Integer.toString(m.getEating()), ' ', 6) + " " +
Utils.rpad(Integer.toString(m.getSporting()), ' ', 8) + " " +
Utils.rpad(Integer.toString(m.getTraveling()), ' ', 9) + " " +
Utils.rpad(Integer.toString(m.getMusic()), ' ', 5));
}
mainMenuHandler();
}

private void viewBestMatch() {
Member m = getBestMatch();
//System.out.println("*****Best match profile displays here******");
if (m != null) {
System.out.println("Congratulations! Below is your best match profile:");
System.out.println();
System.out.println("Username Email Age Gender Reading Eating Sporting Traveling Music");
System.out.println("=============== ======================================== === ====== ======= ====== ======== ========= =====");
System.out.println(Utils.rpad(m.getUserId(), ' ', 15) + " " +
Utils.rpad(m.getEmail(), ' ', 40) + " " +
Utils.rpad(Integer.toString(m.getAge()), ' ', 3) + " " +
Utils.rpad(m.getGender(), ' ', 6) + " " +
Utils.rpad(Integer.toString(m.getReading()), ' ', 7) + " " +
Utils.rpad(Integer.toString(m.getEating()), ' ', 6) + " " +
Utils.rpad(Integer.toString(m.getSporting()), ' ', 8) + " " +
Utils.rpad(Integer.toString(m.getTraveling()), ' ', 9) + " " +
Utils.rpad(Integer.toString(m.getMusic()), ' ', 5));

} else {
System.out.println("Sorry no match for you at this moment!");
}
mainMenuHandler();
}

//This method will return a Member object or NULL value. NULL means no match.
private Member getBestMatch() {
Member bestMatch = null;
double bestMatchScore = -1; // The smaller the better. Negative means no match. 999999 is an unrealistically large number
for (int i = 0; i < members.size(); i++) {
Member m = members.get(i);
if(currentMember.getMatchScore(m) > bestMatchScore){
bestMatchScore = currentMember.getMatchScore(m);
bestMatch = m;
}
}
return bestMatch;
}

private boolean userExists(String userId) {
boolean answer = false;
  
for (int i = 0; i < members.size(); i++) {
Member m = members.get(i);
if (m.getUserId().equals(userId)) {
answer = true;
break;
}
}
  
return answer;
}

}

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.