IT Jobs in Java in Germany

Here is the answer I sent you by PM:

From the limited information you gave, and not being in IT myself, I cannot tell you the answers to your questions - and honestly I doubt that anybody can.
IT jobs exist anywhere, but generally more where other industries (which the IT serves) are located. Where you should look depends on which industry you want to target and where you want to live.
For average salary information, you can check online salary survey results - but keep in mind you as a non-German-speaking non-EU-citizen will be offered less.
Accommodation costs vary widely between cities and even within them. It also depends on what you want - e.g. sublet rooms are generally cheaper than one-room apartments.
I think six month is the minimum you need to find a job, but much depends on your luck and how much of a network you build before your arrival.