Difference between each instance of servlet and each thread of servlet in servlets?
24537
How do servlets work? Instantiation, sessions, shared variables and multithreading
101036
Real differences between "java -server" and "java -client"?
599
Is Java "pass-by-reference" or "pass-by-value"?
39664
What does Thread Local Objects mean in Flask?
60936
Servlet vs RESTful
80169
How to determine which form has been submited and to validate them in a servlet
109430
What is the scope of the local variable/methods of an instance
113556
How is an instance initializer different from a constructor?
33481
Getting server name during servlet initialization
58747
How can I pass a parameter to a Java Thread?
106257
What are the possible problems caused by adding elements to unsynchronized ArrayList's object by multiple threads simultaneously?
125084
What does the servlet  value signify
28098
When would you call java's thread.run() instead of thread.start()?
141803
The difference between the Runnable and Callable interfaces in Java
92256
Where's javax.servlet?
72332
How to Properly Handle Exceptions in a JSP/Servlet App?
131997
When and how should I use a ThreadLocal variable?