The ShowBean Program
We began this chapter using the
ShowBean program to experiment with Swing components, and with
the custom components developed as examples. As promised, the
implementation is here in Example
11-30. This is another example of a Swing application that uses
JMenuBar, and so on. It uses the
LookAndFeelPrefs utility class from Example 11-29, demonstrates the
JTabbedPane component, and shows
the use of tooltips in Swing.
ShowBean relies on the
Bean class of Example 15-10. This class
provides the JavaBeans magic for listing, querying, setting, and
invoking bean properties and commands. You’ll have to skip ahead to
Chapter 15 if you want to see how
that piece works.
ShowBean also has a feature
that was not mentioned before: in addition to creating beans based on
their classname, it can also read beans that have been serialized to a
file using the
serialization mechanism or the (new in Java 1.4) JavaBeans persistence
mechanism. Use the
-xml options on the command line to create a
bean from a file. Additionally, the File menu contains entries that allow you to
save a bean (and its currently set properties) to a file using either
serialization or the JavaBeans persistence mechanism.
Example 11-30. ShowBean.java
package je3.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.beans.*; import java.lang.reflect.*; import java.util.List; // explicit import to disambiguate from java.awt.List import ...