import javax.swing.JOptionPane;
import java.io.*;
import java.util.*;
public class user
{
    public static ArrayList<ArrayList<String>>  users;
    public static void main(String[] args) throws IOException
    {
        boolean validInput = false;
        int chances = 3;
        String username = new String();
        String password = new String();

        File inputFile = new File("users.txt");
        users = new ArrayList<ArrayList<String>>();
        users.add(new ArrayList<String>());
        users.add(new ArrayList<String>());
        users.add(new ArrayList<String>());

        String fileElements[];

        Scanner in = new Scanner(inputFile);

        while(in.hasNext())
        {
            fileElements = (in.nextLine()).split(",");
            users.get(0).add(fileElements[0]);
            users.get(1).add(fileElements[1]);
            users.get(2).add((fileElements[2]));
        }

        in.close();

        while(!validInput && chances!=0)
        {
            username = JOptionPane.showInputDialog(null,"Enter your username");
            password = JOptionPane.showInputDialog(null,"Enter your password");
            for(int j = 0;j<users.get(0).size();j++)
            {
                if(username.equals(users.get(0).get(j)) && password.equals(users.get(1).get(j)))
                {
                    validInput = true;
                    JOptionPane.showMessageDialog(null,"Login details are valid");
                }
            }
            if(!validInput)
            {
            chances--;
            JOptionPane.showMessageDialog(null,"You have " + (chances) + " chances left");
            }
        }
    }
}