For junior programmers, the frameworks and tools are little less import as most organizations assume that you can be mentored on them by more senior staff. They want a solid foundation on which to build that knowledge. To that I end, read and internalize _Effective Java_ by Joshua Bloch. I also highly recommend _Java Concurrency in Practice_ by Brian Goetz and _Clean Code_ by Robert Martin. In parallel, let how to write robust, complete unit tests.