How can make this class in two separate classs, the menu inside this class should stand as a separate calss like "Menu.java"

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.PrintWriter;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.Scanner;

public class Driver {

static ArrayList dogs;

static ArrayList courses;

static File dogsFile;

static File coursesFile;

static Scanner scanner;

public static void main(String[] args) {

dogsFile = new File("c://temp/dogs.txt");

coursesFile = new File("c://temp/courses.txt");

dogs = new ArrayList();

courses = new ArrayList();

scanner = new Scanner(System.in);

try {

loadData();

showMenu();

} catch (FileNotFoundException e) {

System.out.println("File not found");

}

}

/**

* method to load data from datafiles

*/

static void loadData() throws FileNotFoundException {

Scanner fileScanner = new Scanner(coursesFile);

while (fileScanner.hasNextLine()) {

String line = fileScanner.nextLine();

/**

* Splitting the line by white spaces

*/

String[] fields = line.split(" ");

String name = fields[0].trim();

double maxTime = Double.parseDouble(fields[1].trim());

/**

* creating a new Courses instance

*/

Courses c = new Courses(name, maxTime);

/**

* Adding to the arraylist

*/

courses.add(c);

}

fileScanner = new Scanner(dogsFile);

while (fileScanner.hasNextLine()) {

String line = fileScanner.nextLine();

/**

* Splitting the line by white spaces

*/

String[] fields = line.split(" ");

String id = fields[0].trim();

String name = fields[1].trim();

double runningTime = Double.parseDouble(fields[2].trim());

double penalty = Double.parseDouble(fields[3].trim());

char code = fields[4].trim().charAt(0);

/**

* creating a new Dogs instance

*/

Dogs d = new Dogs(id, name, runningTime, penalty, code);

/**

* Adding to the arraylist

*/

dogs.add(d);

}

}

/**

* method to display the menu and get user choice repeatedly until user

* quits

*/

static void showMenu() {

System.out.println("1. Print report");

System.out.println("2. Add a Dog");

System.out.println("3. Exit");

System.out.println("Enter a choice: ");

try {

int choice = Integer.parseInt(scanner.nextLine());

switch (choice) {

case 1:

printReport();

break;

case 2:

addDog();

break;

case 3:

System.out.println("Good bye!");

System.exit(0);

default:

System.out.println("Invalid choice");

break;

}

} catch (Exception e) {

System.out.println("Invalid choice, try again");

showMenu();

}

showMenu();

}

/**

* method to print report this will prompt the user to select a course, and

* then will call printReport(coursecode, maxtime) method, which will

* calculate and print the statistics

*/

static void printReport() {

System.out.println("Choose the course:");

System.out

.println("Enter G for Gamblers, J for Jumpers, or T for Titling");

String choice = scanner.nextLine();

if (choice.equalsIgnoreCase("G")) {

for (Courses c : courses) {

if (c.getName().equalsIgnoreCase("Gamblers")) {

printReport('G', c.getMaximumTime());

}

}

} else if (choice.equalsIgnoreCase("J")) {

for (Courses c : courses) {

if (c.getName().equalsIgnoreCase("Jumpers")) {

printReport('J', c.getMaximumTime());

}

}

} else if (choice.equalsIgnoreCase("T")) {

for (Courses c : courses) {

if (c.getName().equalsIgnoreCase("Titling")) {

printReport('T', c.getMaximumTime());

}

}

} else {

System.out.println("Invalid choice");

}

}

/**

* this method will be called by the printReport() method by supplying

* course code and maxtime. this will calculate and print the report of the

* specified course

*/

static void printReport(char courseCode, double maxTime) {

String courseName = "";

if (courseCode == 'G') {

courseName = "Gamblers";

} else if (courseCode == 'J') {

courseName = "Jumpers";

} else if (courseCode == 'T') {

courseName = "Titling";

}

System.out.println("Report\t" + courseName + "\tCourse Time: "

+ maxTime);

Date date = new Date();

System.out.println("Date: "

+ new SimpleDateFormat("MMMMM dd,yyyy").format(date));

System.out.printf("%10s %15s %15s %10s %10s %15s", "ID", "Name",

"Running Time", "Penalty", "Total", "Over/Under Time");

/**

* two Dogs objects to represent winning dog and the dog with most

* penalties

*/

Dogs winningDog = null;

Dogs dogWithMostPenalty = null;

for (Dogs d : dogs) {

char c = d.getCourseCode();

/**

* Considering only those dogs who participated in this course

*/

if (Character.toUpperCase(c) == courseCode) {

/**

* Calculating the total time

*/

double totalTime = d.getRunningTime() + d.getPenalty();

if (winningDog == null) {

winningDog = d;

} else {

/**

* checking if the total time is less than that of the

* currently assumed winning dog's if yes, assign current

* dog as the winning dog

*/

if (totalTime < (winningDog.getRunningTime() + winningDog

.getPenalty())) {

winningDog = d;

}

}

if (dogWithMostPenalty == null && d.getPenalty() > 0) {

dogWithMostPenalty = d;

} else {

if (d.getPenalty() > dogWithMostPenalty.getPenalty()) {

dogWithMostPenalty = d;

}

}

double over_underTime = totalTime - maxTime;

String overUnderTimeString = "";

if (over_underTime > 0) {

/**

* appending the + sign to the overtime string

*/

overUnderTimeString = "+"

+ String.format("%.2f", over_underTime);

} else {

overUnderTimeString = String.format("%.2f", over_underTime);

}

/**

* Displaying the stats

*/

System.out.printf(" %10s %15s %15.2f %10.2f %10.2f %15s",

d.getId(), d.getName(), d.getRunningTime(),

d.getPenalty(), totalTime, overUnderTimeString);

}

}

System.out.println();

if (winningDog == null) {

/**

* No dogs

*/

System.out.println("No data");

} else {

System.out.println("Winning Dog: " + winningDog.getName()

+ ", Time: "

+ (winningDog.getRunningTime() + winningDog.getPenalty()));

}

if (dogWithMostPenalty != null) {

System.out.println("Dog with most penalty: "

+ dogWithMostPenalty.getName() + ", Penalty: "

+ dogWithMostPenalty.getPenalty());

}

}

/**

* method to add a dog to the arraylist and to the datafile

*/

static void addDog() {

System.out

.println("Enter ID: (1 digit followed by a letter, followed by 3 digits)");

String id = scanner.nextLine();

if (id.length() != 5) {

System.out.println("Invalid ID");

return;

} else {

/**

* Checking if id is in proper format

*/

if (!(Character.isDigit(id.charAt(0))

&& Character.isLetter(id.charAt(1))

&& Character.isDigit(id.charAt(2))

&& Character.isDigit(id.charAt(3))

&& Character.isDigit(id.charAt(4)))) {

System.out.println("Invalid ID");

return;

}

}

System.out.println("Enter dog name: ");

String name = scanner.nextLine();

try {

System.out.println("Enter running time");

double runTime = Double.parseDouble(scanner.nextLine());

if (runTime <= 0) {

System.out.println("Invalid run time");

return;

}

System.out.println("Enter penalty: ");

double penalty = Double.parseDouble(scanner.nextLine());

if (penalty < 0) {

System.out.println("Invalid penalty");

return;

}

System.out.println("Enter course code: ");

String code = scanner.nextLine();

if (code.equalsIgnoreCase("G") || code.equalsIgnoreCase("J")

|| code.equalsIgnoreCase("T")) {

Dogs d = new Dogs(id, name, runTime, penalty, code.charAt(0));

dogs.add(d);

/**

* Defining a printwriter object to append data to the file

*/

PrintWriter writer = new PrintWriter(new FileOutputStream(dogsFile,true));

writer.append(" " + id + " " + name + " " + runTime + " "

+ penalty + " " + code);

writer.close();

System.out.println("Dog added");

}

} catch (NumberFormatException e) {

System.out.println("Invalid input");

} catch (Exception e) {

System.out.println("Some error occured");

return;

}

}

}