Why instance variable in Servlet is not thread-safe
24537
How do servlets work? Instantiation, sessions, shared variables and multithreading
79857
Avoid synchronized(this) in Java?
11951
Should I use properties or direct reference when accessing instance variables internally?
137716
Why is creating a Thread said to be expensive?
29010
Is ExecutorService (specifically ThreadPoolExecutor) thread safe?
128684
When does Thread.CurrentThread.Join() make sense?
79348
Is errno thread-safe?
70345
Why does the inner exception reach the ThreadException handler and not the actual thrown exception?
75941
Initialization of instance fields vs. local variables
67426
Why are wait() and notify() declared in Java's Object class?
9714
Why does `instanceof` error rather than return `false` when used for 2 incompatible classes?
120716
Avoiding 'instanceof' in Java
97798
How to iterate over a container in a thread-safe way?
57935
Why does the instance need to be recreated when restarting a thread?
113556
How is an instance initializer different from a constructor?
65095
Why is spawning threads in Java EE container discouraged?
109442
How to deal with cross-thread access exceptions?