I'm writing a banking program in Java, and am having some trouble getting a couple of my methods to be called correctly. When I try to compile my files, these are the errors I get:
MustangBanking.java:74: error: cannot find symbol
displayAccounts();
^
symbol: method displayAccounts()
location: class MustangBanking
MustangBanking.java:75: error: cannot find symbol
deleteAccount();
^
symbol: method deleteAccount()
location: class MustangBanking
2 errors
The two relevant files (only pasting relevant portions here) in my package are MustangBanking.java:
public class MustangBanking {
public static void main(String[] args) {
//Declare and initialize data fields
//irrelevant code
case 3:
displayAccounts();
deleteAccount();
break;
//more irrelevant code
and Account.java
public class Account {
//Declare and initialize data fields
//irrelevant code
public void deleteAccount() {
//method code
}
public void displayAccounts() {
//method code
}
//irrelevant code
I read elsewhere that my issue is that the two methods in question should be defined in the MustangBanking class and not the Account class, and that they should be defined outside of the main method. But when I do that, I get errors that all of my variables, etc cannot be found. What am I forgetting here? If you need more code/clarification, please let me know and I'll post it.
Thank you!
edit: MustangBanking class
import java.util.*;
import java.io.*;
//MustangBanking class
public class MustangBanking {
public static void main(String[] args) {
//Declare and initialize data fields
int id = 1000;
double depositAmount = 0.0;
double withdrawAmount = 0.0;
double checkAmount = 0.0;
double balance = 0.0;
double annualInterestRate = 0.0;
boolean run = true;
int option;
Scanner in = new Scanner(System.in);
Account account = new Account();
//Create ArrayList of type Account to store all Account objects
ArrayList<Account> accounts = new ArrayList<>();
//Loop to run the program inside of
while (run) {
//Display the menu
System.out.println("\nMUSTANG BANKING MENU");
System.out.println("\n1 -- Create a new checking account");
System.out.println("2 -- Create a new savings account");
System.out.println("3 -- Delete an existing account");
System.out.println("4 -- View a specific account");
System.out.println("5 -- View all accounts");
System.out.println("6 -- Write checks for a checking account");
System.out.println("7 -- Deposit funds into an account");
System.out.println("8 -- Withdraw funds from an account");
System.out.println("9 -- Find account with the largest balance");
System.out.println("10 -- Exit");
System.out.println("\nEnter Option:");
option = in.nextInt();
//Switch statement to direct program based on option entered by user
switch (option) {
//create a new checking account
case 1:
CheckingAccount c1 = new CheckingAccount(id, balance, annualInterestRate); //Create a new CheckingAccount object
id++; //increment id by 1
accounts.add(c1); //add the new CheckingAccount to the Arraylist accounts
break;
//create a new savings account
case 2:
SavingsAccount s1 = new SavingsAccount(id, balance, annualInterestRate); //create a new SavingsAccount object
id++; //increment id by 1
accounts.add(s1); //add the new SavingsAccount to the ArrayList accounts
break;
//delete an existing account
case 3:
//c1.displayAccounts();
//c1.deleteAccount();
break;
- Account class
import java.util.*;
import java.io.*;
//Account class
public class Account {
//Declare and initialize data fields
protected int id = 1000;
protected double balance = 0.0;
protected double annualInterestRate = 0.0;
protected double monthlyInterestRate;
protected Date dateCreated;
protected double depositAmount = 0.0;
protected int pendingChecks = 0;
Scanner in = new Scanner(System.in);
//Create ArrayList of type Account to store all Account objects
ArrayList<Account> accounts = new ArrayList<>(); //do i need to create the arraylist in every class?
//Delete account
public void deleteAccount() {
System.out.println("\nPlease enter the ID of the account you wish to delete:");
id = in.nextInt(); //take user input of id to delete
accounts.remove(id); //remove the account
}
//Display all accounts
public void displayAccounts() {
System.out.println("\nAvailable accounts:\n");
for (int i = 0; i < accounts.size(); i++) {
System.out.println(accounts.get(i).getId()); //print the id instead of the index
}
}
//Display one account
public void displayAccount() {
//Prompt user for the account they want to view
System.out.println("\nPlease enter the ID of the account you would like to view:");
id = in.nextInt();
//Print the account information
for (int i = 0; i < accounts.size(); i++) {
if (accounts.get(i).getId() == id) {
//if savings account
if (accounts.get(i) instanceof SavingsAccount) {
System.out.println("Account type: Savings");
}
//if checking account
else if (accounts.get(i) instanceof CheckingAccount) {
System.out.println("Account type: Checking");
}
}
}
System.out.println("Account: " + id); //Print ID
System.out.println("Balance: " + balance); //Print balance
System.out.println("Date created: " + dateCreated); //Print date created
System.out.println("Annual interest rate: " + annualInterestRate + "%"); //Print annual interest rate
//if checking account, print number of pending checks
for (int i = 0; i < accounts.size(); i++) {
if (accounts.get(i).getId() == id) {
if (accounts.get(i) instanceof CheckingAccount) {
System.out.println("Number of pending checks: " + pendingChecks);
}
}
}
}
You are calling Methods of Account class in MustangBanking class without using the object of Account class. This is causing the issue.
Try to change the below main method code:
public static void main(String[] args) {
Account account = new Account();
//Declare and initialize data fields
//irrelevant code
case 3:
account.displayAccounts();
account.deleteAccount();
break;
//more irrelevant code
Account Class add the below method to Account class
public void add(Account a){
accounts.add(a)
}
call this method from all the switch cases:
//Switch statement to direct program based on option entered by user
switch (option) {
//create a new checking account
case 1:
CheckingAccount c1 = new CheckingAccount(id, balance, annualInterestRate); //Create a new CheckingAccount object
id++; //increment id by 1
account.add(c1); //add the new CheckingAccount to the Arraylist accounts
break;
//create a new savings account
case 2:
SavingsAccount s1 = new SavingsAccount(id, balance, annualInterestRate); //create a new SavingsAccount object
id++; //increment id by 1
account.add(s1); //add the new SavingsAccount to the ArrayList accounts
break;
//delete an existing account
case 3:
//c1.displayAccounts();
//c1.deleteAccount();
break;
Delete Method
//Delete account
public void deleteAccount() {
System.out.println("\nPlease enter the ID of the account you wish to delete:");
id = in.nextInt(); //take user input of id to delete
Iterator<Account> iAccount = accounts.iterator();
while(iAccount.hasNext()){
Account account = iAccount.next();
if(account.getId()==id){
accounts.remove(account);
}
}
}