I\'m trying to debug this problem but not sure where exactly i need to replace SWT jar file for Eclipse.
Current System Config:
Ecl
Install a JDK.
It's possible to get Eclipse to run with a JRE, or at least it used to be, but why bother? Eclipse is much happier with a JDK.
Remember that the JRE that is used to run Eclipse does not have to be the JRE that Eclipse uses to run an application.
PS. I'm assuming here that the original poster's problem was getting Eclipse to start, and not (as some other Answers seem to address) getting Eclipse to start an application.