How to Eliminate Blank Space When Moving a JMenuBar to the Mac Screen Menu Bar?

Moving JMenuBar to Screen Menu Bar on Mac OS X without Blank Space

Problem:

Moving the JMenuBar to the screen menu bar using System.setProperty("apple.laf.useScreenMenuBar", "true") leaves blank space in the window where the menu would normally reside.

Answer:

The blank space issue can be resolved by performing the following steps:

• Set the property at launch time: Instead of setting the property after launching the program, set it at launch time using the following command:

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

• Set the property in Info.plist: Alternatively, set the property in your application bundle's Info.plist file:

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

Note:

The issue does not occur when following the approach suggested in the provided code sample. Other factors, such as the missing DesktopMain component, may contribute to the problem.

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