What is the quickest/easiest way to learn Java for a seasoned .NET/C# (more than 7 years) and C++ (5years) developer.
When I say to learn Java - I mean being able to write applications in a "Java way" using base classes library + where needed using a popular Java libraries (it is great that so many of them are open source).
I know that Java development comes in a lot of flavors - enterprise applicatons (Java EE), mobile devices (Java ME), objects hosted in application servers (to my knowledge Java has a buch of these) - however at the moment I am interested in a general Java development - may be with a some emphasis on a integration projects/enterprise development.
So basically - I am a strong, passionate about technology, proud to be a senior C#/C++ developer with a dozen years of experience who wants to dedicate a month-worth (may be more) of evenings to learn to effectively program in Java environment.
Having said that I don't mean I am switching from .NET/C++ to Java - but I would probably have to spend 30%-50% of my development time developing/supporting/whateverstageintheSDLC in Java.
Thank you.