This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
How can I get a Java 7 application to have its menu bar at the top of the screen (on a Mac) and also have correctly working keyboard shortcuts?
I have a Java application with a Swing user interface. Many menus have keyboard equivalents, which are essential.
There is very little that is system-dependent, but on Mac OS X the menu bar should appear at the top of the screen instead of on each window, so I set apple.laf.useScreenMenuBar.
This works fine on Java 6, but on Java 7 compiling and running the same code causes the keyboard shortcuts to carry out their menu actions twice. For example, in the attached code, command-O opens two file dialogues instead of one. (The other keyboard shortcuts also act twice, but you sometimes have to move windows to see that they did.)
The keyboard problem goes away if I don't set apple.laf.useScreenMenuBar, and that's what I'll do if I have to, but my Mac users will be displeased. I'd really like to have the menu bar in the right place and the keyboard shortcuts working.
System: Mac OS 10.7.3 (Lion) on a late-2010 MacBook Pro
java version "1.7.0_04"
Java(TM) SE Runtime Environment (build 1.7.0_04-b21)
Java HotSpot(TM) 64-Bit Server VM (build 23.0-b21, mixed mode)
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04-415-11M3635)
Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01-415, mixed mode)
Where I've looked:
I asked the same question on StackOverflow, without (so far) any responses. If you can answer here, I'll be happy to write up your answer there, unless you'd prefer to do that yourself.
My apologies for the length of the demo code below (148 lines), but my Swing coding is very old-fashioned. It should compile and run from the command line without any special flags or settings. Here we go ...