Yes and no. If you have the source code for the clients then yes. If no then no. Unless the its not obfuscated. However, you could always skid away the things that are online. Just copy and paste them into the project. Hope and pray to the all mighty lord Satan that it works and hey presto!
Why eclipse? Dude do you even notepad.exe? There are better IDEs than eclipse.. Well depends upon a person. I prefer notepad tho.