This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
"My question is, can I generate a UML like diagrams given just java code? Class diagram perhaps.. I am using eclipse as an IDE." You can use Enterprise Architech or Rational XDE to generate Class diagrams.Sequence diagrams can't be generated directly,Not sure about Eclipse IDE.Try to install model eclipse plugins.You may be able to generate class digram after installations. Please raise this question in Enterprise Architech's Forum.