Problem description : Prepare a Java program and object-oriented design methodology for the preparation of a calling card category. Including the card number, password, and the balance credited to the numbers b) Basic requirements : type attributes have card number, password, and the balance go to the numbers, Telephone cards can be used to operate the telephone link, to return to balance method and telephone methods to achieve. C) method functional description : Construction (PhoneCard (card number, passwords, balances, credited numbers)) to be completed initialization assigned attribute values, judgment and balance, a balance of negative on the withdrawal system, Please approach to the initial structure of the home for the false link that is not connected said. EVERGREEN long cardNumber

java.txt

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