
12.2 GUI Components 825
12.2 GUI Components
We have already said that a component is an object having a graphical rep-
resentation. Labels, text fields, buttons, radio buttons, checkboxes, and
drop-down lists are examples of components. A component performs at
least one of these functions:
■
displays information
■
collects data from the user
■
allows the user to initiate program functions
Java provides an extensive set of classes that can be used to add a GUI to
your applications. Table 12.2 lists some GUI components and the Java
classes that encapsulate them. All classes listed in Table 12.2 belong to the
javax.swing package.
Java supports two implementations ...