For this assignment, you will write a program that keeps track of your expenses, taking the information from a text file and displaying it back to you. A skeleton of the program is provided to you. You can find it in modules and it is named Assignment3.java. You are also provided with logs.txt will contains the data you will be reading from and writing to in this Assignment. Lastly, you are provided with Assignment3.jar, which you can run on your machine to simulate how the program can run.

This purpose of this assignment is for you to understand and use arrays, methods and loops fully; you will also learn how to access data from files and how to manipulate this data in various ways to display the required output. At the end, you will be given a .jar file which you can run from the terminal to see the expected output and compare to your own program. We will explain how you can run the .jar file this later.

Please read through all of the instructions first, before starting.

When starting the program, the program reads the file logs.txt into 5 parallel String arrays or ArrayLists by calling the method readFile(). The method readFile(), stores each date in a date String array/ArrayList, as well as, each transaction type, category, money amount and updated balance into a new separate String array or ArrayList.

Then the user is given the following choices:

Make a log

View all logs for my previous expenses

View all logs for deposits

View all logs for a month

View Customized logs for a month

View all logs for a day

View Customized logs for a day

View all logs for a previous expenses

View all logs for a previous deposits

View all logs till date

Quit

Each option in this menu will have its own method. If the method is not already provided in the skeleton code, you will need to make it yourself. After the user chooses one option, other than to Quit, the menu will be displayed and the user will get to pick another option. This should continue looping until the user chooses to quit.

Each menu option is described below:

Option A:

For this method, the user will be able to create a log. First, ask the user if he or she would like to log (A) a deposit, or (B) an expense. Based on that choice, they will next be asked to enter a category for that expense/deposit. For example, if one chose option B, they could then type in food as the expense category.

Next, ask for the amount for that expense or deposit. If it was an expense, this amount will be subtracted from the current balance. If it was a deposit, it will be added.

Once the user enters everything, this information must be added to the text file. The program should also automatically determine the current date, as well as the current balance, and save all of this to the text file.

Note that to get and update the current balance, you will need to obtain the last item in the text file. This will probably be taken in as a String, so you must also parse it to convert to an integer. For example:

int number = Integer.ParseInt(someString);

Again, once we have all five variables (date, type, category, amount, and balance), they will be added into the text file in that order and separated by spaces. Finally, display back to the user that a log has been successfully added.

Option B: The program will use the 5 parallel arrays to print every log where the user has recorded an expense. Make sure to print all the information:

Date

Type (Expense or Deposit)

Category (such as Food, etc)

Amount

Balance

Option C:

The program will use the 5 parallel arrays to print the logs where the user has recorded a deposit. Make sure to display all the same information as described above in Option B.

Option D:

The program will first ask the user to enter the month he or she would like to look up. Next, use the 5 parallel arrays to print all the logs where the month recorded is the same as that of the users input.

Option E:

This option is like Option D, but more specific. Again, ask the user to enter the month they would like to look up. Next, also ask them to select either Expenses or Deposits. Finally, ask the user for the deposit or expense category (food, salary, etc.). Once you have all this information, use the 5 parallel arrays to print all the logs that contain only the information that the user has set.

Option F:

Ask the user to enter a specific month and day he or she would like to look up. Next, use the 5 parallel arrays to print all the logs where that month and day correspond to that which the user inputted.

Option G:

Like option F, ask the user to enter a specific month and day. Then, ask them to also enter whether it was an expense or deposit, as well as the category. Once you have all this information, use the 5 parallel arrays to print all the logs that contain only the information that the user has set.

Option H:

The program will ask the user what type of expense they would like to look up. Provide a menu listing the possible types of expenses they may choose from (such as food, entertainment, etc.). Once the user makes a choice, use the 5 parallel arrays to print all the logs based on the inputted type.

Option I:

The program will ask the user what type of deposit they would like to look up. Provide a menu listing the possible types of deposits they may choose from (such as food, entertainment, etc.). Once the user makes a choice, use the 5 parallel arrays to print all the logs based on the inputted type.

Option J:

This option will be to print all the logs from the text file.

Skeleton Code:

import java.io.*;

import java.text.*;

import java.util.*;

/**

* Write a really good Description on how you understand this algorithm. The Description should briefly describe

* on how the program is running to what it should do.

*

* @author Very smart TA

* @version 4/2/2018

*/

public class Assignment3 {

//You can use a static scanner if you want or you can declare scanner in individual methods.

//Static Scanner is beneficial as it will save you time in declaring the Scanner again and again

//You can also use your static String arrays or ArrayLists here.

//Using them here will make them "global" variables which means you can use these arrays anywhere in your code!

public static char menu() {

System.out.println("Select one of the following options ");

System.out.println("A. Make a log");

System.out.println("B. View all logs for my previous expenses");

System.out.println("C. View all logs for deposits");

System.out.println("D. View all logs for a particular month");

System.out.println("E. View Customized logs for a particular month");

System.out.println("F. View all logs for a particular day");

System.out.println("G. View Customized logs for a particular day");

System.out.println("H. View all logs for a particular previous expenses");

System.out.println("I. View all logs for a particular previous deposits");

System.out.println("J. View all logs till date");

System.out.println("Q. Quit");

//Write code that will return the user choice instead of Q

return 'Q';

}

/**

* @description: This method reads in the file logs.txt and loops through every line in the file.

* It stores each date in the date String array/ArrayList, as well as each transaction type,

* category, amount and updated balance into a new separate array/ArrayList. You will be using these arrays/ArrayLists as parallel arrays.

* Hint: use option J for reference!

*/

public static void readFile() throws IOException{

}

public static void optionA() throws IOException {

System.out.println("You chose to make a log. Please select one of the following option");

System.out.println("1. Log an expense");

System.out.println("2. Log a Deposit");

//write a code to take the user choice

//Write code for reading an existing file and appending a new line at the end.

System.out.println("Log Succesfully Added ");

}

public static void optionB() throws IOException {

System.out.println("You chose to view all logs for expenses");

//Write code for Option B here

}

public static void optionC() throws IOException {

System.out.println("You chose to view all logs for deposits");

//Write code for Option C here

}

public static void optionD() throws IOException {

System.out.println("You chose to view all logs for particular month. Enter the month you would like to see (1-12)");

//Write code for Option D here

}

public static void optionE() throws IOException {

System.out.println("You chose to view customized logs for a particular month. Enter the month: ");

//Write code for Option E here

}

public static void optionF() throws IOException {

System.out.println("You chose to view all logs for particular month. Enter the month you would like to see (1-12)");

//Take the user input for month

System.out.println("You chose to view all logs for particular month. Enter the month you would like to see (1-31)");

//Take the user input for day

//Write code for Option F here

}

public static void optionG() throws IOException {

System.out.println("You chose to view customized logs for a particular month. Enter the month: ");

//Take the user input for month

System.out.println("Enter the Day (1-31): ");

//Take the user input for day

//Write code for Option F here

}

public static void optionH() throws IOException {

System.out.println("You chose to view all logs for a particular Expense. Please select one of the following option");

System.out.println("1. Food");

System.out.println("2. Entertainment");

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

System.out.println("4. Other");

//Take the user choice

//Write the code for Option H

}

public static void optionI() throws IOException {

System.out.println("You chose to view all logs for a particular Deposit. Please select one of the following option");

System.out.println("1. Salary");

System.out.println("2. Dad_Sent_Some");

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

//Take the user choice

//Write the code for Option I

}

/**

* This Is the only method given to you. Use this method to understand.

* You can copy paste code from this method to any other methods.

* However, if you do copy, make sure that you have necessary tweaks / addition / changes to the code

* based on what the option wants.

*

* Hint : All the methods in some way is going to use this code given in OptionJ method. By using

* proper conditional statements and user input and proper calculations, correct results for display can be obtained.

*

* @throws IOException

*/

public static void optionJ() throws IOException {

//A BufferedReader object is used to read an existing file in the project.

//Make sure that the log.txt file is in the Java Project Folder.

BufferedReader br = new BufferedReader(new FileReader("logs.txt"));

//br.readLine() reads the first line from the BufferedReader, assigns it to String line and then deletes it.

//This way, we can reach the 2nd line or the nth line by writing br.readLine(); two times or n times.

String line = br.readLine();

//to write a code that reach end of file (n lines)

//we say that while line has some string in it. Once at an end, br.readLine returns null if all lines are finished.

while (line != null) {

//String Tokenizer is something that is used to seperate words in a line based on a delimeter

//Default delimeter is space and our log.txt file is space delimetered file for each line.

StringTokenizer st = new StringTokenizer(line);

//Since we know that each line has 5 elements to it, we can use that information and assign those 5 strings (Tokens)

//And now we have individual Access to data, ie. we can now see the particular line and see the date, type, event, etc and use it for comparison.

String date = st.nextToken();

String type = st.nextToken();

String event = st.nextToken();

int amount = Integer.parseInt(st.nextToken());

int balance = Integer.parseInt(st.nextToken());

//This line will be simply printing out the give string. we use \t to make it in a better Format.

System.out.println(date + " \t" + type + " \t" + event + " \t" + amount + " \t" + balance);

//In order to not repeat the process for the same line, we use br.readLine at the end of loop to make sure that it has a next line

//and to assign that new line to the variable line and repeat the same process until its value reaches to null.

line = br.readLine();

}

}

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

System.out.println("Welcome to your daily expense table OUO");

//Add a suitable looping for this menu. It can be While / Do-while / for loops.

//The menu should loop every time after the option execution is over until the user selects Q

// Don't forget to re-read the file every time a new loop comes around :)

char choice = menu();

switch (choice) {

case 'A':

optionA();

break;

case 'B':

optionB();

break;

case 'C':

optionC();

break;

case 'D':

optionD();

break;

case 'E':

optionE();

break;

case 'F':

optionF();

break;

case 'G':

optionG();

break;

case 'H':

optionH();

break;

case 'I':

optionI();

break;

case 'J':

optionJ();

break;

case 'Q':

System.out.println("GoodBye :)");

break;

default:

System.out.println("Invalid Option :(");

}

}

}