The second project involves writing a program that implements an ATM machine.  The interface to the program should be a GUI that looks similar to the  following: The program should consist of three classes. The first class  should define the GUI and should be hand-coded and not generated by a GUI  generator. In addition to the main method and a constructor to build the GUI,  event handlers will be needed to handle each of the four buttons shown above  When the Withdraw button is clicked, several checks must be made.
The first  check is to ensure the value in the text field is numeric. Next a check must  be made to ensure the amount is in increments of $20. At that point an  attempt to withdraw the funds is made from the account selected by the radio  buttons. The attempt might result in an exception being thrown for  insufficient funds, If any of those three errors occur a JOptionPane window  should be displayed explaining the error. Otherwise a window should be  displayed confirming that the withdrawal has succeeded. When the Deposit  button is clicked the only necessary check is to ensure that the amount input  in the textfield is numeric.
Clicking the Transfer button signifies  transferring funds to the selected account from the other account.   The checks needed are to confirm that the amount supplied is numeric and that  there are sufficient funds in the account from which the funds are being  transferred. Clicking the Balance button will cause a JOptionPane window to  be displayed showing the current balance in the selected account. The main  class must contain two Account objects, one for the checking account and  another for the savings account. The second class is Account.It must have a  constructor plus a method that corresponds to each of the four buttons in the  GUI. It must also incorporate logic to deduct a service charge of $1.50 when  more than four total withdrawals are made from either account.
Note that this  means, for example, if two withdrawals are made from the checking and two  from the savings, any withdrawal from either account thereafter incurs the  service charge. The method that performs the withdrawals must throw an  InsufficientFunds exception whenever an attempt is made to withdraw more  funds than are available in the account. Note that when service charges  apply, there must also be sufficient funds to pay for that charge. The third  class is InsufficientFunds, which is a user defined checked exception. Be  sure to follow good programming style, which means making all instance and  class variables private, naming all constants and avoiding the duplication of  code. Furthermore you must select enough scenarios to completely test the  program.

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