question: private void decideUILookAndFeel ( MainOptions options ) { try { boolean systemPlaf = false ; systemPlaf = options . system_plaf ; String systemPlafReq = System . getenv ( "systemplaf" ) ; if ( systemPlafReq != null && systemPlafReq . equalsIgnoreCase ( "true" ) ) systemPlaf = true ; if ( systemPlaf ) UIManager . setLookAndFeel ( UIManager . getSystemLookAndFeelClassName ( ) ) ; } catch ( Exception exc ) { exc . printStackTrace ( ) ; } }
target:  NOrmally the look and feel should be the standard one, java, allow to set the systemplaf to have the system look and feel