Skip to Main Content
Java Swing, 2nd Edition
book

Java Swing, 2nd Edition

by Dave Wood, Robert Eckstein, Marc Loy, James Elliott, Brian Cole
November 2002
Intermediate to advanced content levelIntermediate to advanced
1278 pages
38h 26m
English
O'Reilly Media, Inc.
Content preview from Java Swing, 2nd Edition

The JFrame Class

The most common Swing container for Java applications is the JFrame class. Like java.awt.Frame, JFrame provides a top-level window with a title, border, and other platform-specific adornments (e.g., minimize, maximize, and close buttons). Because it uses a JRootPane as its only child, working with a JFrame is slightly different than working with an AWT Frame. An empty JFrame is shown in Figure 8-9.

Empty JFrame instances on Unix, Mac, and Windows platforms

Figure 8-9. Empty JFrame instances on Unix, Mac, and Windows platforms

The primary difference is that calls to add( ) must be replaced with calls to getContentPane( ).add( ). In fact, the addImpl( ) method is implemented so that a call made directly to add( ) throws an Error. (The error message tells you not to call add( ) directly.)

Properties

JFrame defines the properties shown in Table 8-8. The accessibleContext property is as expected. ContentPane , glassPane, layeredPane, and JMenuBar are really properties of JRootPane (described earlier in the chapter). JFrame provides direct access to these panes, as required by the RootPaneContainer interface.

Table 8-8. JFrame properties

Property

Data type

get

is

set

Default value

accessibleContext o

AccessibleContext

·

  

JFrame.Accessible-JFrame( )

background o

Color

·

 

·

UIManager.getColor ("control")

contentPane o

Container

·

 

·

From rootPane

defaultCloseOperation

int

·

 

·

HIDE_ON_CLOSE

glassPane o

Component

·

 

·

From rootPane ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Java Threads, 3rd Edition

Java Threads, 3rd Edition

Scott Oaks, Henry Wong

Publisher Resources

ISBN: 0596004087Errata PageSupplemental Content