How to Move the JMenuBar to the Mac OS X Screen Menu Bar and Avoid Blank Spaces?

Moving the JMenuBar to the Mac OS X Screen Menu Bar

The task of moving the JMenuBar to the Mac OS X screen menu bar often leaves an unpleasant blank space where the menu would reside in the application window. To rectify this issue, utilize the following code:

System.setProperty("apple.laf.useScreenMenuBar", "true")

However, if implemented after the program has launched, this method may prove ineffective. For this reason, incorporate the setting at launch time instead:

java -Dapple.laf.useScreenMenuBar=true -jar MyApplication.jar

Another alternative is to set the property within the Info.plist file of the application bundle. Refer to the following resources for more detailed information:

• Java Deployment Options for Mac OS X
• Java Dictionary Info.plist Keys
• About Info.plist Keys
• Java Runtime System Properties

<key>Properties</key>
<dict>
    <key>apple.laf.useScreenMenuBar</key>
    <string>true</string>
    ...
</dict>

Additionally, it's worth noting that the approaches suggested herein do not lead to the space issue encountered by the original poster. This indicates that the missing DesktopMain component may be the underlying cause.

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