// Fig. 15.7: MenuOption.java
// enum type for the credit-inquiry program's options.
public enum MenuOption {
   // declare contents of enum type
   ZERO_BALANCE(1),
   CREDIT_BALANCE(2),
   DEBIT_BALANCE(3),
   END(4);

   private final int value; // current menu option

   // constructor
   private MenuOption(int value) {this.value = value;}
} 


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