Using Collections and Strings in a Reusable Class - Java Programming: Comprehensive Concepts and Techniques - page 571

The following steps enter the code for the public instance methods, set() and
validate(), for the Password class.

To Code public Instance Methods

1. Enter lines 134 through 162 as shown in Figure 9-31.
TextPad displays the code for the set() method in the coding window
(Figure 9-33).

throws exception
if password not
added to ArrayList

ArrayList
contains()
method called

ArrayList size() method called

set() method
to set new
password value
and maintain
history

ArrayList remove()
method called

ArrayList add()
method called

if password
expired, reset to
not expired

remaining uses for
password set if password
automatically expires

FIGURE 9-33

(continued)