public static void setPreferencesHandler ( Object target , Method prefsHandler ) { boolean enablePrefsMenu = ( target != null && prefsHandler != null ) ; if ( enablePrefsMenu ) { setHandler ( new OSXAdapter ( "handlePreferences" , target , prefsHandler ) ) ; } // If we're setting a handler, enable the Preferences menu item by calling // com.apple.eawt.Application reflectively try { Method enablePrefsMethod = macOSXApplication . getClass ( ) . getDeclaredMethod ( "setEnabledPreferencesMenu" , new Class [ ] { boolean . class } ) ; enablePrefsMethod . invoke ( macOSXApplication , new Object [ ] { Boolean . valueOf ( enablePrefsMenu ) } ) ; } catch ( Exception ex ) { System . err . println ( "OSXAdapter could not access the About Menu" ) ; ex . printStackTrace ( ) ; } }
They will be called when the Preferences menu item is selected from the application menu