Question

In this assignment you will practice using Data Structures and Object Oriented concepts in Java. Your implementation should target the most efficient algorithms and data structures. You will be graded based on the efficiency of your implementation. You will not be awarded any points if you use simple nested loops to implement the below tasks. You should use one or more of the below data structures: - ArrayList : - JavaDoc: http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html - Tutorial: http://docs.oracle.com/javase/tutorial/collections/interfaces/list.html Question You are provided with the Data class that contains a users array (Data.users) which is an array of users. Each element in the array represents a single user record. Each record is a string formatted as : firstname, lastname, age,email, gender, city, state. You are asked to perform the following tasks: 1. YourimplementationforthisquestionshouldbeincludedinMainPart1.javafile. 2. Create a User class that should parse all the parameters for each user. Hint: extract each value from a user's record using Java's String.split() method and set the delimiter to a comma. Each user record should to be assigned to a User object. 3. YourgoalistoPrintouttheTOP10oldestusers. 4. Hint: To sort use the Collections.sort(). http://docs.oracle.com/javase/6/docs/api/java/util/ Collections.html

also I shared the file in goolgle drive: https://drive.google.com/file/d/1YJiug2s21mzYoXkeoQocZeNg-yz5AOZt/view?usp=sharing
https://drive.google.com/file/d/1pylRrOhNUFthzzK-ZCs5Uh5I4DyeMDBW/view?usp=sharing

Answer 1

//code screenshot

MainPart1.java Data.java 1 package edu.sfsu.cs.datastructures; 3e import java.util.* 4 import java. lang. 5 import java.io.* 6 class User private String firstName, lastName,email,gender,city,profession; private int age; public Uer String firstName,String lastName,int age,String email,String gender, String city, String profession) 18e this.firstName-firstName this.lastName-lastName this.age-age; this.email-email; this.gender-gender; this.city-city; this.profession-profession; 12 13 14 16 17 18 19 String getfirstName) return first Name; int getAge) 25 26 return age; public String toString) 29 return firstName+", "+lastName+","+age+","+email+","+gender+" +city+,"+profession; 31 32 35 class Sortbyage implements Comparator <User> 36 37 38 // Used for sorting in ascending order of // roll number public int compare(User a, User b) △396 return (b.getAgeO - a.getAge /desendiog order 41 43 45 public class MainPartl 46 /* 47 eQuestion 1: In this question you wil a list of users. Formatted as: firstname lastname,age,email,gender,city,state -Create a User class that should parse all the parameters for each user l use the Data. users array that includes Insert each of the users in a list 51 52 *Print out the TOP 10 oldest users private static ArrayList<User userlist-new ArrayList<User> public static void main(String args) //example on how to access the Data.users array * for (String str.: Data.users) System.out.println(str

System.out.printlnGstr; 61 63 65 67 for (String str : Data.users) String[ userval-str.split(","; //System.out.println uservalre]); User newuser-new UserCuserval [0],userval[1],Integer.parseInt(userval [2]), userval [3],userval[4], userval [5],userval[6]); userlist.add(newuser); 68 Collections.sort(userlist, new Sortbyage; for int i-0;i<10;i++) System.out.printlnCuserlist.get(i)

//code to copy

package edu.sfsu.cs.datastructures;

import java.util.*;

import java.lang.*;

import java.io.*;

class User

{

private String firstName,lastName,email,gender,city,profession;

private int age;

public User(String firstName,String lastName,int age,String email,String gender, String city,String profession)

{

this.firstName=firstName;

this.lastName=lastName;

this.age=age;

this.email=email;

this.gender=gender;

this.city=city;

this.profession=profession;

}

String getfirstName()

{

return firstName;

}

int getAge()

{

return age;

}

public String toString()

{

return firstName+","+lastName+","+age+","+email+","+gender+","+city+","+profession;

}

};

class Sortbyage implements Comparator<User>

{

// Used for sorting in ascending order of

// roll number

public int compare(User a, User b)

{

return (b.getAge() - a.getAge()); //desending order

}

};

public class MainPart1 {

/*

* Question 1:

* - In this question you will use the Data.users array that includes

* a list of users. Formatted as : firstname,lastname,age,email,gender,city,state

* - Create a User class that should parse all the parameters for each user.

* - Insert each of the users in a list.

* - Print out the TOP 10 oldest users.

* */

private static ArrayList<User> userlist = new ArrayList<User>();

public static void main(String[] args) {

//example on how to access the Data.users array.

/* for (String str : Data.users) {

System.out.println(str);

}*/

for (String str : Data.users) {

String[] userval=str.split(",");

//System.out.println(userval[0]);

User newuser=new User(userval[0],userval[1],Integer.parseInt(userval[2]),userval[3],userval[4],userval[5],userval[6]);

userlist.add(newuser);

}

Collections.sort(userlist, new Sortbyage());

for(int i=0;i<10;i++)

{

System.out.println(userlist.get(i));

}

}

};

//output screenshot

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