Hi Shyam,
use
UIDefaults uid = UIManager.getDefaults();
uid.put("TitleBorder.font", new FontUIResource("Arial Unicode MS", Font.PLAIN, 10));
NOTE :- that the the property is put in UIManager's default table and not in UIManager directly. Also note that FontUIResource is used and not Font obj
There r few issues re. this i'll better post that in other
thread (sorry i forgot the thread name) our other listmate A$HI$H (not me

) wanna know how to handle theme related issues.
well i'll post perhaps Monday night cause u know Cricket fever is going on.