What is relevant for java ee?

Question

Java

Good day.
What is relevant for java ee today? I know Java at about the level of a middle android developer, previously I wrote the server part of working projects in php, but my soul requires something beautiful)) Now I'm starting a personal project, the server decided to write in java, in connection with this I am interested in the following questions:

• What java technologies are relevant?
  
• How justified is development without the use of frameworks?
  
• If we still consider frameworks, then I would like to hear your recommendations, the issue of gluttony in terms of resources / speed of work is very interesting
  
• Which application server is better to choose?
  

I will also be grateful for interesting links to java resources.
Thanks in advance.
update:
Planned website with social elements. networks for the existing audience, approximate attendance is 2-10 thousand/day, API for the mobile client is also planned

Answer 1

How justified is development without the use of frameworks?

no matter how much. This applies to any language.