3.2.2 AccountTest Class That Creates and Uses an Object of Class Account

Next, we’d like to use class Account in an app and call each of its methods. A class that contains a main method begins the execution of a Java app. Class Account cannot execute by itself because it does not contain a main method—if you type java Account in the command window, you’ll get an error indicating “Main method not found in class Account.” To fix this problem, you must either declare a separate class that contains a main method or place a main method in class Account.

Driver Class AccountTest

To help you prepare for the larger programs you’ll encounter later in this book and in industry, we use a separate class AccountTest (Fig. 3.2) containing method main

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