import java.io.*;
import java.util.*;

public class PasswordGenerator
{
    public static void main(String args[]) throws IOException
    {
        // initialize the input and output objects.
        Scanner input = new Scanner(new File ("userNames.txt"));
        PrintWriter output = new PrintWriter(new File("passwords.txt"));

        final int LENGTH = 8;

        output.println("User" + "    " + "Password");

        String password = "";

        while (input.hasNext()) {
            String userName = input.nextLine();

            for (int i = 1 ; i < LENGTH; i++){
                int charChoice = 1 + (int) (Math.random() * 4);
                char curl = ' ';

                switch(charChoice){
                    case 1: curl = getLowerCaseCharacter(); break;
                    case 2: curl = getUpperCaseCharacter(); break;
                    case 3: curl = getSpecialCharacter(); break;
                    case 4: curl = getRandomDigitCharacter(); break;
                }// end the switch statement

                password += curl;
            }// end the for loop
            System.out.println(userName + "    " + password);
            password = "";
        }// end the while loop
    } // End method main

    public static char getRandomCharacter(char ch1, char ch2) {
        return (char) (ch1 + Math.random() * (ch2 - ch1 + 1));
    }

    public static char getLowerCaseCharacter(){
        return getRandomCharacter('a', 'z');
    }

    public static char getUpperCaseCharacter(){
        return getRandomCharacter('A', 'Z');
    }

    public static char getSpecialCharacter(){
        char special = ' ';
        int specialNum = 1 + (int) Math.random() * 7;
        switch(specialNum){
            case 1: special = '!'; break;
            case 2: special = '$'; break;
            case 3: special = '%'; break;
            case 4: special = '&'; break;
            case 5: special = '('; break;
            case 6: special = ')'; break;
            case 7: special = '?'; break;
        }// end the swith
        return special;
    }// end returnSpecialCharacter Method

    public static char getRandomDigitCharacter(){
        return getRandomCharacter('0' , '9');
    }
} /// End class <program_name>