Problem Please provide comments and all the steps to solve

Problem ( Please provide comments and all the steps to solve this problem )

Implement in Java a superclass BankAccount. Make two subclasses, SavingAccount and CheckingAccount, that inherit from BankAccount. A bankAccount has a balance (instance var). A savingAccount has an interestRate (instance var) indicating the interest rate in percent. A checkingAccount has an operationCount (instance var) and two constants: FREE_OPERATIONS = 5 and OPERATION_FEE = 2.5.

Write the class declarations, the constructors and the following   methods:

BankAccount:

deposit(); withdraw(double amount); getBalance(); and transfer(BankAccount other, double amount)

SavingAccount:

addInterest to increase the current balance using the interestRate   percent.

CheckingAccount:

deductionFees() to deduct from the current balance the OPERATION_FEE amount when the operationCount > FREE_OPERATIONS, and then set operationCount =   0.

Please note that for the checkingAccount objects, every time you call the deposit or the withdraw methods you need to increase the operationCount var.

Supply a test program that tests these classes and methods.

Solution

code:

class BankAccount
{
float balance;
public BacnkAccount()
{
balance=0;
}
public BankAccount(float b)
{
balance =b;
}
public deposit(float mon)
{
balance+=mon;
}
public withdraw(float mon)
{
balance -=mon;
}
public float getbalance()
{
return balance;
}
}
class SavingAccount extends BankAccount{
float interestRate;
public SavingAccount()
{
interestRate = 0;
}
public SavingAccount(float ir)
{
interestRate = ir;
}
public addInterest()
{
balance+= (balance*interestRate);//increment the balance
}
  
}
class CheckingAccount extends BankAccount
{
int OperationCount;
float FREE_OPERATIONS = 5;
float OPERATION_FEE = 2.5.
CheckingAccount()
{
OperationCount=0;
}
public deductionFees()
{
if(operationCount > FREE_OPERATIONS)
{
balance -= OPERATION_FEE;
operationCount = 0;
}
}
public deposit(float mon)
{
balance+=mon;
operationCount++;//overwriting the method
}
public withdraw(float mon)
{
balance -=mon;
operationCount++;//overwriting the method
}
}