Dynamic checkbox in Java

I am working on a Java project and I was thinking of a way to check some inputs.

I will communicate with my database and the response will be the number of wrong telephone numbers.

What I would like to do is to read the response and create a checklist where I will list the number of wrong telephones.

For instance, if my database returns 2 wrong numbers I would like to create two checkbox and ask the users whether they fixed it or not.

Can you also suggest me a way to save this response. Will it be better to save it as a simple string or as a JSON?