What means 1L serialVersionUID? When could I use this default value 1L?

Question

There are 3 ways to define the serialVersionUID :

1. private static final long serialVersionUID = 1L; (Default)
2. private static final long serialVersionUID = -         


        

Answer 1

You can assign any long value to serialVersionUID, but you have to change it every time you modify your class.

The second looks like a generated serialVersionUID, based on the features of the current class version.