I whipped up a batch file to start a Java app I was developing, and it kept opening an ugly DOS window. I first tried making a shortcut and setting it to start minimized, but then I came across this thread at Sun Developer Network and applied it successfully to keep the window from popping up:
@ECHO OFF start javaw -classpath .;swt.jar CrosswordGame exit
2.2.3 is a security and bug-fix release for the 2.2 series. Since this is a security release, we suggest you upgrade immediately. Two of the fixes are high priority.