Implementing Methods

Now that we know how the object stores its state, we can provide the implementations for the methods of the class. The implementation for three methods of the CheckingAccount class is given below.

The implementation of the methods is straightforward. When some amount of money is deposited or withdrawn, the balance increases or decreases by that amount.

The getBalance method simply returns the current balance. A return statement obtains the value of a variable and exits the method immediately. The return value becomes the value of the method call expression. The syntax of a return statement is:

return expression;

or

return; // Exits the method without sending back a value, used in return-type void methods