Swing Interfaces with Sorting and Searching - Java Programming: Comprehensive Concepts and Techniques - page 455

Table 7-8 JScrollPane Methods

METHOD PURPOSE EXAMPLE

JScrollPane() Accepts a Swing myScrollPane = new

component as an argument JScrollPane(myTextPane);

setVerticalScrollBarPolicy() Determines when the

myScroll.setVerticalScrollBarPolicy

vertical scrollbar appears

(JScrollPane.

in the JScrollPane

VERTICAL_SCROLLBAR_ALWAYS);

setPreferredSize() Sets the size of the paneScrollPane.setPreferredSize(new

JScrollPane Dimension(500,200));

setWheelScrollingEnabled() Enables/disables scrolling

aScroll.setWheelScrollingEnabled(true);

in response to movement
of the mouse wheel

setViewportBorder() Adds a border around the dataScroll.setViewport(borderStyle);

viewport

The following step enters code for the createContentPane() method.

To Code the createContentPane() Method

1. Enter the code from Figure 7-19 on page 453.
TextPad displays the code for the createContentPane() method
(Figure 7-21).

JComboBox
methods

components added
to northPanel

code to create
display area

content pane
methods

content pane
returned to
calling method

FIGURE 7-21

The getContentPane() method from the Container class can be used with
JApplets or JFrames. When used with JApplets, the creation of the content pane
must take place in the init() method because the content pane connects its com-
ponents with the applet itself upon execution. With JFrames, the creation of the
content pane takes place in main() or in the constructor method.