How to set Splash Screen Display Time in Java (using NetBeans IDE)?

Now I'm using NetBeans IDE to develop my Java Applications in my projects. So far I've done well but I wanted a splash screen in there so i edited the manifest.mf file and added the splash screen code ( I actually followed the first step of this tut : a href="http://wiki.netbeans.org/Splash_Screen_Beginner_Tutorial" rel="nofollow"http://wiki.netbeans.org/Splash_Screen_B…/a ) I am getting the splash screen but it stays up for very est time, around 100 ms, is there anyway to extend the display time?? At least to around 2 seconds