I have no idea about how to install roboguice 3.0 in my eclipse,I searched a lot but none of the links didn't give me a clear desc about this..any help would be appreciated.
If you don't want to use a dependency manager like Maven then I think these instructions are what you can use with eclipse https://github.com/roboguice/roboguice/wiki/InstallationNonMaven Once you have the jars downloaded just follow these instructions for Eclipse How to import a jar in Eclipse
But I would highly suggest configuring something like Maven to manage your dependencies for you. Eclipse has good integration with them so you'll never have to worry about dependencies again.