How to fill all the fields in the class?

Question

Suppose I have a class that has a lot of different fields. This class is a DTO and for testing purposes, I do not care about actual values, just it exists. Is there any tool

Answer 1

Just a small googling provide this results:

• EasyRandom simple to use modern java solution, formerly known as Random beans
• EasyRandom for Java 6, formerly known as JPopulator.
• PODAM with a tutorial

else you can use reflection to populate:

• primitive/wrapper with default value
• string with rendom value
• Collection(set,list) with random size and re-using code to populate

and so on.

Else XML binding (with jaxb or other technology) can be an option but needs to prepare xml with data in advance.
Except frameworks all other solutions have two big issues: needs to be written and a lot of testing!