Applying It

Try to complete the following exercises by yourself.

Independent Exercise 1

Extend the methods Withdraw and Transfer of the Person/Account example presented previously to include verification of overdraft (to make sure that there is enough money before making a withdrawal—that the balance after withdrawal is always ≤ 0).

Independent Exercise 2

Modify the balance property of the Person class to deal with the case when an invalid account ID is provided in a better fashion (i.e., detect the error and warn the user).

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