The document describes a Java implementation of a banking system with abstract classes for accounts, specifically savings and checking accounts. It includes methods for creating accounts, depositing, withdrawing, and checking account balances, as well as generating bank statements. Sample code sections illustrate the functionality and interaction of the classes, along with expected user inputs and outputs.

1. /*
* The java class Account that simultes
* the Account class.
* */
//Account.java
public abstract class Account {
private String name;
private String accountNumber;
private double balance;
//Constructor to set name, account number and balnace
public Account(String name,
String accountNumber,
double balance)
{
this.name=name;
this.accountNumber=accountNumber;
this.balance=balance;
}
public void setBalance(double balance)
{
this.balance=balance;
}
public double getBalance()
{
return balance;
}
public void depositMoney(double amt)
{
this.balance=this.balance+amt;
}

2. public void withdrawMoney(double amt)
{
this.balance=this.balance-amt;
}
public String toString() {
return "Account Name:"+name
+" Account Number:"+accountNumber
+" Current Balance:"+balance;
}
//abstract methods
public abstract void checkCurrentBalance();
public abstract void bankStatement();
}
--------------------------------------------------------------------------------------------------------------------
----------------
/**
* The class SavingsAccount that simulates the savings account
* */
//SavingsAccount.java
public class SavingsAccount extends Account
{
private double interestRate;
//Constructor
public SavingsAccount(String name, String accountNumber, double balance,
double interestRate ) {
super(name, accountNumber, balance);
this.interestRate=interestRate;
}

3. //overirde the checkCurrentBalnace
public void checkCurrentBalance() {
System.out.println(super.toString());
System.out.println("Type: Checking Account");
}
//overirde the bankStatement
public void bankStatement()
{
System.out.println(super.toString());
System.out.println("Interest Rate: "
+interestRate+"%");
double balance=super.getBalance();
double interstamt=balance*(interestRate/100.0);
System.out.println("Interest Amount: "
+interstamt+"%");
super.setBalance(balance+interstamt);
System.out.println("Balance:$"+super.getBalance());
}
}
--------------------------------------------------------------------------------------------------------------------
----------------
/*
* The java class CheckingAccount that simultes the checking account.
* */
//CheckingAccount.java
public class CheckingAccount extends Account
{
private final double MONTHLY_FEE=10;
public CheckingAccount(String name, String accountNumber, double balance) {
super(name, accountNumber, balance);
}
public void checkCurrentBalance() {
System.out.println(super.toString());

4. System.out.println("Type: Checking Account");
}
public void bankStatement() {
System.out.println(super.toString());
System.out.println("Type: Checking Account");
System.out.println("Monthly Fee:$"+MONTHLY_FEE);
super.setBalance(super.getBalance()-MONTHLY_FEE);
System.out.println("New Balance:$"+super.getBalance());
}
}
--------------------------------------------------------------------------------------------------------------------
----------------
/**
* The java program BankTransactions that simulates
* the bank transactions.
* */
//BankTransactions.java
import java.util.Scanner;
public class BankTransactions
{
private final static double SAVINGS_RATE=1.5;
private static Scanner scanner=new Scanner(System.in);
public static void main(String[] args)
{
Account act=null;
String name;
String accountNumber;
double balance;
int type;
while(true)
{
//calling menu method

5. int choice=menu();
switch(choice)
{
case 1:
System.out.println("Enter name");
name=scanner.nextLine();
System.out.println("Enter account number");
accountNumber=scanner.nextLine();
System.out.println("Enter balance");
balance=Double.parseDouble(scanner.nextLine());
System.out.println("Enter type of account");
System.out.println("1.Savings 2.Checking");
type = Integer.parseInt(scanner.nextLine());
if(type==1)
act=new SavingsAccount(name, accountNumber, balance, SAVINGS_RATE);
else
act=new CheckingAccount(name, accountNumber, balance);
break;
case 2:
if(act==null)
System.out.println("First open an account");
else
act.checkCurrentBalance();
break;
case 3:
if(act==null)
System.out.println("First open an account");
else
{
System.out.println("Enter deposit amount : $");
double deposit=Double.parseDouble(scanner.nextLine());
act.depositMoney(deposit);

6. }
break;
case 4:
if(act==null)
System.out.println("First open an account");
else
{
System.out.println("Enter withdraw amount : $");
double withdraw=Double.parseDouble(scanner.nextLine());
act.withdrawMoney(withdraw);
}
break;
case 5:
if(act==null)
System.out.println("First open an account");
else
act.bankStatement();
break;
}
}
}
//menu method that returns the user choice
private static int menu() {
System.out.println("1. Open new account");
System.out.println("2. Check current balance");
System.out.println("3. Deposit");
System.out.println("4. Withdraw");
System.out.println("5. Print Monthly Statement");
System.out.println("Enter your choice");
int choice = Integer.parseInt(scanner.nextLine());
return choice;
}

7. }
--------------------------------------------------------------------------------------------------------------------
----------------
Sample Output:
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
1
Enter name
Johnson
Enter account number
123456789
Enter balance
1000
Enter type of account
1.Savings 2.Checking
1
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
2
Account Name:Johnson
Account Number:123456789
Current Balance:1000.0
Type: Checking Account
1. Open new account
2. Check current balance

8. 3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
3
Enter deposit amount : $
100
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
2
Account Name:Johnson
Account Number:123456789
Current Balance:1100.0
Type: Checking Account
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
4
Enter withdraw amount : $
50
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
3
Enter deposit amount : $
5

9. 1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
5
Account Name:Johnson
Account Number:123456789
Current Balance:1055.0
Interest Rate: 1.5%
Interest Amount: 15.825%
Balance:$1070.825
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
Solution
/*
* The java class Account that simultes
* the Account class.
* */
//Account.java
public abstract class Account {
private String name;
private String accountNumber;
private double balance;
//Constructor to set name, account number and balnace
public Account(String name,
String accountNumber,

10. double balance)
{
this.name=name;
this.accountNumber=accountNumber;
this.balance=balance;
}
public void setBalance(double balance)
{
this.balance=balance;
}
public double getBalance()
{
return balance;
}
public void depositMoney(double amt)
{
this.balance=this.balance+amt;
}
public void withdrawMoney(double amt)
{
this.balance=this.balance-amt;
}
public String toString() {
return "Account Name:"+name
+" Account Number:"+accountNumber
+" Current Balance:"+balance;
}
//abstract methods

11. public abstract void checkCurrentBalance();
public abstract void bankStatement();
}
--------------------------------------------------------------------------------------------------------------------
----------------
/**
* The class SavingsAccount that simulates the savings account
* */
//SavingsAccount.java
public class SavingsAccount extends Account
{
private double interestRate;
//Constructor
public SavingsAccount(String name, String accountNumber, double balance,
double interestRate ) {
super(name, accountNumber, balance);
this.interestRate=interestRate;
}
//overirde the checkCurrentBalnace
public void checkCurrentBalance() {
System.out.println(super.toString());
System.out.println("Type: Checking Account");
}
//overirde the bankStatement
public void bankStatement()
{
System.out.println(super.toString());
System.out.println("Interest Rate: "
+interestRate+"%");
double balance=super.getBalance();
double interstamt=balance*(interestRate/100.0);
System.out.println("Interest Amount: "
+interstamt+"%");

12. super.setBalance(balance+interstamt);
System.out.println("Balance:$"+super.getBalance());
}
}
--------------------------------------------------------------------------------------------------------------------
----------------
/*
* The java class CheckingAccount that simultes the checking account.
* */
//CheckingAccount.java
public class CheckingAccount extends Account
{
private final double MONTHLY_FEE=10;
public CheckingAccount(String name, String accountNumber, double balance) {
super(name, accountNumber, balance);
}
public void checkCurrentBalance() {
System.out.println(super.toString());
System.out.println("Type: Checking Account");
}
public void bankStatement() {
System.out.println(super.toString());
System.out.println("Type: Checking Account");
System.out.println("Monthly Fee:$"+MONTHLY_FEE);
super.setBalance(super.getBalance()-MONTHLY_FEE);
System.out.println("New Balance:$"+super.getBalance());
}
}
--------------------------------------------------------------------------------------------------------------------
----------------
/**

13. * The java program BankTransactions that simulates
* the bank transactions.
* */
//BankTransactions.java
import java.util.Scanner;
public class BankTransactions
{
private final static double SAVINGS_RATE=1.5;
private static Scanner scanner=new Scanner(System.in);
public static void main(String[] args)
{
Account act=null;
String name;
String accountNumber;
double balance;
int type;
while(true)
{
//calling menu method
int choice=menu();
switch(choice)
{
case 1:
System.out.println("Enter name");
name=scanner.nextLine();
System.out.println("Enter account number");
accountNumber=scanner.nextLine();
System.out.println("Enter balance");
balance=Double.parseDouble(scanner.nextLine());
System.out.println("Enter type of account");
System.out.println("1.Savings 2.Checking");
type = Integer.parseInt(scanner.nextLine());

14. if(type==1)
act=new SavingsAccount(name, accountNumber, balance, SAVINGS_RATE);
else
act=new CheckingAccount(name, accountNumber, balance);
break;
case 2:
if(act==null)
System.out.println("First open an account");
else
act.checkCurrentBalance();
break;
case 3:
if(act==null)
System.out.println("First open an account");
else
{
System.out.println("Enter deposit amount : $");
double deposit=Double.parseDouble(scanner.nextLine());
act.depositMoney(deposit);
}
break;
case 4:
if(act==null)
System.out.println("First open an account");
else
{
System.out.println("Enter withdraw amount : $");
double withdraw=Double.parseDouble(scanner.nextLine());
act.withdrawMoney(withdraw);
}
break;
case 5:
if(act==null)
System.out.println("First open an account");

15. else
act.bankStatement();
break;
}
}
}
//menu method that returns the user choice
private static int menu() {
System.out.println("1. Open new account");
System.out.println("2. Check current balance");
System.out.println("3. Deposit");
System.out.println("4. Withdraw");
System.out.println("5. Print Monthly Statement");
System.out.println("Enter your choice");
int choice = Integer.parseInt(scanner.nextLine());
return choice;
}
}
--------------------------------------------------------------------------------------------------------------------
----------------
Sample Output:
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
1
Enter name

16. Johnson
Enter account number
123456789
Enter balance
1000
Enter type of account
1.Savings 2.Checking
1
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
2
Account Name:Johnson
Account Number:123456789
Current Balance:1000.0
Type: Checking Account
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
3
Enter deposit amount : $
100
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
2
Account Name:Johnson

17. Account Number:123456789
Current Balance:1100.0
Type: Checking Account
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
4
Enter withdraw amount : $
50
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
3
Enter deposit amount : $
5
1. Open new account
2. Check current balance
3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice
5
Account Name:Johnson
Account Number:123456789
Current Balance:1055.0
Interest Rate: 1.5%
Interest Amount: 15.825%
Balance:$1070.825
1. Open new account
2. Check current balance

18. 3. Deposit
4. Withdraw
5. Print Monthly Statement
Enter your choice