Java SE (Java Platform, Standard Edition)

Hi,

I am trying to open an url like:file:///C:/a.html#ABC_DEF
with rundll32 url.dll,FileProtocolHandler but not opening.
If I try :file:///C:/a.html is just working fine.

What could be the problem?
my lunch command string is like below:
String launchCommand = "rundll32 url.dll,FileProtocolHandler " + filePath;

I tried with replacing # with %23 ( file:///C:/a.html%23ABC_DEF ),still of no use.
Please do reply m new to this forum.