Apple WebObjects 3.5 Instrukcja Użytkownika Pobierz pdf (Strona 41)

Creating a Custom Guest Class

In the ﬁrst chapter, you created individual variables to store a guest’s name,

e-mail address, and comments. When keeping track of multiple guests, it’s

more useful to encapsulate all the data for a guest as a single entity. You’ll

do this by creating a Java class that contains the data for a single guest.

1. In Project Builder’s browser, select Classes in the ﬁrst column.

2. Choose File

m New in Project.

3. Type

Guest.java as the name of the ﬁle.

4. Click OK.

The newly created ﬁle contains a skeleton for a class called Guest.

5. Enter the following code to complete the deﬁnition of the Guest class.

A class stores information in its instance variables (also referred to as

data members). Here you’re declaring three instance variables for Guest:

name, email, and comments. Note that these declarations are the same as

those that appeared in the code for

Main.java when you added the three

variables using WebObjects Builder. In WebObjects, a component is

Type name of class here.

Add your class’s

instance variables.

Add constructor for

Guest class.

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Apple WebObjects 3.5 Instrukcja Użytkownika Strona 41