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Java - Task #1 Extending BankAccount Copy the files AccountDriver.java and BankAccount.java

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Java - Task #1 Extending BankAccount Copy the files AccountDriver.java and BankAccount.java

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Task #1 Extending BankAccount


1. Copy the files AccountDriver.java (code listing 10.1) and BankAccount.java


(code listing 10.2) from the Student CD or as directed by your instructor.


BankAccount.java is complete and will not need to be modified.


2. Create a new class called CheckingAccount that extends BankAccount.


3. It should contain a static constant FEE that represents the cost of clearing one


check. Set it equal to 15 cents.


4. Write a constructor that takes a name and an initial amount as parameters. It


should call the constructor for the superclass. It should initialize accountNumber


to be the current value in accountNumber concatenated with –10 (All checking


accounts at this bank are identified by the extension –10). There can be only one


checking account for each account number. Remember since accountNumber is a


private member in BankAccount, it must be changed through a mutator method.


5. Write a new instance method, withdraw, that overrides the withdraw method in


the superclass. This method should take the amount to withdraw, add to it the fee


for check clearing, and call the withdraw method from the superclass. Remember


that to override the method, it must have the same method heading. Notice that


the withdraw method from the superclass returns true or false depending if it was


able to complete the withdrawal or not. The method that overrides it must also


return the same true or false that was returned from the call to the withdraw


method from the superclass.


6. Compile and debug this class.


Task #2 Creating a Second Subclass


1. Create a new class called SavingsAccount that extends BankAccount.


2. It should contain an instance variable called rate that represents the annual interest


rate. Set it equal to 2.5%.


3. It should also have an instance variable called savingsNumber, initialized to 0. In


this bank, you have one account number, but can have several savings accounts with


that same number. Each individual savings account is identified by the number


following a dash. For example, 100001-0 is the first savings account you open,


100001-1 would be another savings account that is still part of your same account.


This is so that you can keep some funds separate from the others, like a Christmas


club account.


4. An instance variable called accountNumber that will hide the accountNumber from


the superclass, should also be in this class.


5. Write a constructor that takes a name and an initial balance as parameters and calls


the constructor for the superclass. It should initialize accountNumber to be the


current value in the superclass accountNumber (the hidden instance variable)


concatenated with a hyphen and then the savingsNumber.


6. Write a method called postInterest that has no parameters and returns no value. This


method will calculate one month's worth of interest on the balance and deposit it into


the account.


7. Write a method that overrides the getAccountNumber method in the superclass.


8. Write a copy constructor that creates another savings account for the same person. It


should take the original savings account and an initial balance as parameters. It


should call the copy constructor of the superclass, assign the savingsNumber to be


one more than the savingsNumber of the original savings account. It should assign


the accountNumber to be the accountNumber of the superclass concatenated with the


hypen and the savingsNumber of the new account.


9. Compile and debug this class.


10. Use the AccountDriver class to test out your classes. If you named and created your


classes and methods correctly, it should not have any difficulties. If you have errors,


do not edit the AccountDriver class. You must make your classes work with this


program.


11. Running the program should give the following output:


Account Number 100001-10 belonging to Benjamin Franklin


Initial balance = $1000.00


After deposit of $500.00, balance = $1500.00


After withdrawal of $1000.00, balance = $499.85


Account Number 100002-0 belonging to William Shakespeare


Initial balance = $400.00


After deposit of $500.00, balance = $900.00


Insuffient funds to withdraw $1000.00, balance = $900.00


After monthly interest has been posted, balance = $901.88


Account Number 100002-1 belonging to William Shakespeare


Initial balance = $5.00


After deposit of $500.00, balance = $505.00


Insuffient funds to withdraw $1000.00, balance = $505.00


Account Number 100003-10 belonging to Isaac Newton


 

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Details

Task #1 Extending BankAccount

1. Copy the files AccountDriver.java (code listing 10.1) and BankAccount.java

(code listing 10.2) from the Student CD or as directed by your instructor.

BankAccount.java is complete and will not need to be modified.

2. Create a new class called CheckingAccount that extends BankAccount.

3. It should contain a static constant FEE that represents the cost of clearing one

check. Set it equal to 15 cents.

4. Write a constructor that takes a name and an initial amount as parameters. It

should call the constructor for the superclass. It should initialize accountNumber

to be the current value in accountNumber concatenated with –10 (All checking

accounts at this bank are identified by the extension –10). There can be only one

checking account for each account number. Remember since accountNumber is a

private member in BankAccount, it must be changed through a mutator method.

5. Write a new instance method, withdraw, that overrides the withdraw method in

the superclass. This method should take the amount to withdraw, add to it the fee

for check clearing, and call the withdraw method from the superclass. Remember

that to override the method, it must have the same method heading. Notice that

the withdraw method from the superclass returns true or false depending if it was

able to complete the withdrawal or not. The method that overrides it must also

return the same true or false that was returned from the call to the withdraw

method from the superclass.

6. Compile and debug this class.

Task #2 Creating a Second Subclass

1. Create a new class called SavingsAccount that extends BankAccount.

2. It should contain an instance variable called rate that represents the annual interest

rate. Set it equal to 2.5%.

3. It should also have an instance variable called savingsNumber, initialized to 0. In

this bank, you have one account number, but can have several savings accounts with

that same number. Each individual savings account is identified by the number

following a dash. For example, 100001-0 is the first savings account you open,

100001-1 would be another savings account that is still part of your same account.

This is so that you can keep some funds separate from the others, like a Christmas

club account.

4. An instance variable called accountNumber that will hide the accountNumber from

the superclass, should also be in this class.

5. Write a constructor that takes a name and an initial balance as parameters and calls

the constructor for the superclass. It should initialize accountNumber to be the

current value in the superclass accountNumber (the hidden instance variable)

concatenated with a hyphen and then the savingsNumber.

6. Write a method called postInterest that has no parameters and returns no value. This

method will calculate one month's worth of interest on the balance and deposit it into

the account.

7. Write a method that overrides the getAccountNumber method in the superclass.

8. Write a copy constructor that creates another savings account for the same person. It

should take the original savings account and an initial balance as parameters. It

should call the copy constructor of the superclass, assign the savingsNumber to be

one more than the savingsNumber of the original savings account. It should assign

the accountNumber to be the accountNumber of the superclass concatenated with the

hypen and the savingsNumber of the new account.

9. Compile and debug this class.

10. Use the AccountDriver class to test out your classes. If you named and created your

classes and methods correctly, it should not have any difficulties. If you have errors,

do not edit the AccountDriver class. You must make your classes work with this

program.

11. Running the program should give the following output:

Account Number 100001-10 belonging to Benjamin Franklin

Initial balance = $1000.00

After deposit of $500.00, balance = $1500.00

After withdrawal of $1000.00, balance = $499.85

Account Number 100002-0 belonging to William Shakespeare

Initial balance = $400.00

After deposit of $500.00, balance = $900.00

Insuffient funds to withdraw $1000.00, balance = $900.00

After monthly interest has been posted, balance = $901.88

Account Number 100002-1 belonging to William Shakespeare

Initial balance = $5.00

After deposit of $500.00, balance = $505.00

Insuffient funds to withdraw $1000.00, balance = $505.00

Account Number 100003-10 belonging to Isaac Newton

 

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Programming Language Java

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