What is the difference between the static and non static block

Question

how static block is used for initialization

Answer 1

Static is like puting hospital patients in quarantine

so the condition of the patients does not effect people outside of quarantine.

Answer 2

Static is isolated

non-Static is not

Answer 3

The static block is called only once when the containing class is accessed for the first time.

Whereas, the non-static block is called every time a new instance is created, just before the constructor.

Also visit http://www.bullraider.com/java/core-java/scjp-ocjp/290-static-non-static-block for more detailed comparison