Skip to 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
1278 pages
38h 26m
English
O'Reilly Media, Inc.
Content preview from Java Swing, 2nd Edition

The JMenu Class

The JMenu class represents the anchored menus attached to a JMenuBar or another JMenu. Menus directly attached to a menu bar are called top-level menus. Submenus, on the other hand, are not attached to a menu bar but to a menu item that serves as its title. This menu item title is typically marked by a right arrow, indicating that its menu appears alongside the menu item if the user selects it. See Figure 14-11.

Top-level menu and submenu

Figure 14-11. Top-level menu and submenu

JMenu is a curious class. It contains a MenuUI delegate, but it uses a ButtonModel for its data model. To see why this is the case, it helps to visualize a menu as two components: a menu item and a pop-up menu. The menu item serves as the title. When it is pressed, it signals the pop-up menu to show itself either below or directly to the right of the menu item. JMenu actually extends the JMenuItem class, which makes it possible to implement the title portion of the menu. This, in effect, makes it a specialized button. On some platforms you can use the mnemonic property of the JMenuItem superclass to define a shortcut for the menu’s title and, consequently, the menu. In addition, you can use the enabled property of JMenuItem to disable the menu if desired.

As with pop-up menus, you can add or insert JMenuItem, Component, or Action objects in the pop-up portion of the menu by calling the add( ) and insert( ) methods. ...

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.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Learning Java, 5th Edition

Learning Java, 5th Edition

Marc Loy, Patrick Niemeyer, Daniel Leuck
Java in a Nutshell, 8th Edition

Java in a Nutshell, 8th Edition

Benjamin J. Evans, Jason R. Clark, David Flanagan
Learning Java, 4th Edition

Learning Java, 4th Edition

Patrick Niemeyer, Daniel Leuck

Publisher Resources

ISBN: 0596004087Errata Page