Day28-RegEx-Patterns-and-Intro-to-Databases

Problem:

Objective
Today, we're working with regular expressions. Check out the Tutorial tab for learning materials and an instructional video!

Task
Consider a database table, Emails, which has the attributes First Name and Email ID. Given N rows of data simulating the Emails table,
print an alphabetically-ordered list of people whose email address ends in @gmail.com.

Solution:

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        int N = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
        ArrayList<String> arr = new ArrayList<String>();
        for (int NItr = 0; NItr < N; NItr++) {
            String[] firstNameEmailID = scanner.nextLine().split(" ");

            String firstName = firstNameEmailID[0];

            String emailID = firstNameEmailID[1];
            if (emailID.contains("@gmail.com")) {
                arr.add(firstName);
            }
            Collections.sort(arr);
        }
        for (int i = 0; i < arr.size(); i++) {
            System.out.println(arr.get(i));
        }
        scanner.close();
    }
}