Question

Is it possible to serialize a non Static Inner class?

If yes can you provide a good example.

I googled through few blogs and sites non of answer convinced me.

EDIT:
How about the inner class having final staic variable.

Answer 1

Inner class contains an implicit reference to the outer class, so for
an inner class to be serializable its outer class must be as well.

Exactly from docs:

Serialization of inner classes (i.e., nested classes that are not
static member classes), including local and anonymous classes, is
strongly discouraged for several reasons. Because inner classes
declared in non-static contexts contain implicit non-transient
references to enclosing class instances, serializing such an inner
class instance will result in serialization of its associated outer
class instance as well. Synthetic fields generated by javac (or other
JavaTM compilers) to implement inner classes are implementation
dependent and may vary between compilers; differences in such fields
can disrupt compatibility as well as result in conflicting default
serialVersionUID values. The names assigned to local and anonymous
inner classes are also implementation dependent and may differ between
compilers. Since inner classes cannot declare static members other
than compile-time constant fields, they cannot use the
serialPersistentFields mechanism to designate serializable fields.
Finally, because inner classes associated with outer instances do not
have zero-argument constructors (constructors of such inner classes
implicitly accept the enclosing instance as a prepended parameter),
they cannot implement Externalizable. None of the issues listed above,
however, apply to static member classes.

So

Because inner classes declared in non-static contexts contain implicit
non-transient references to enclosing class instances, serializing
such an inner class instance will result in serialization of its
associated outer class instance as well.

Source