I have been learning Java through the Java MOOC and I find the workbook-style approach of learning very effective for me. Basically, I’m looking for resources, offline or online that have plenty of exercises.

Preferably, they should clearly define the tools that I’m allowed to use (because there are many ways to code for a problem), and have some ability to give feedback, for example if it’s a physical book it should provide some input and output tests for self-checking.