银行贷款-uml图

Withdraw

accountnumber:amount:

excute() 

Bank Account

account number:pin:

validpin()getbalance()credit()debit() 

cash dispenser

count:match:

releasecash()

Deposit

Deposit Slot

accept cash()

Screen

displaymessage()

ATM

authentication()

Bank detabase

getbalance()credit()debit()

Keypad

getinput()

Balance Inquiry

account number：

excute()