Ask HN: Learn Java and Scala as Python dev in 48 hours?

Hi HN,

I know python good enough to write working programs. I haven't had chance to work on functional programming or collections , but CRUD app, database interactions, ETL is kind of work I have done.

I want to learn Java and Scala. I am little familiar with Java such as basic concept of class, object, main function, compiling programs , I know about inheritance and polymorphism but not good enough to write programs.

I want to learn about Java and start writing workable programs. Where should I start? I want to be able to write workable programs in next 48 hours or I will be disappointed with myself with everything else going on.

Same goes for Scala. I started learning it from twitter tutorial but left in between. At this I only remember I used sbt for development.

I am 29 and I don't know Java or Scala is such a shame.

Let me know if you know or have link to any good resources.

Thanks.