public class CheckingAccount extends BankAccount
{
   // Inherits:
   //    Variables: accNum, name, balance
   //    Methods:   deposit(amount), withdraw(amount)

   /* ----------------------------------------------
      Constructor: CheckingAccount(a, n, amount)
      ---------------------------------------------- */
   public CheckingAccount(int a, String n, double amount)
   {
      /* --------------------------------------------------------------
         Can't use this: accNum = a; // Cannot access private variables
                         name = n;   // in the base class BankAccount !
                         balance = amount;
         -------------------------------------------------------------- */

      /* ---------------------------------------------------
	 Invoke a constructor in the super (base) class
         --------------------------------------------------- */
      super( a, n, amount );
   }

   /* -------------------------------------
      transfer(toAccount, amount)
      ------------------------------------- */
   public void transfer( BankAccount toAccount, double amount )     
   {
      this.withdraw(amount);      // deduct amount from this account;    
      toAccount.deposit(amount);  // add amount to "toAccount";
   }
}