Maven Wrapper and Code Formatting for easier contributions

[ccudennec-otto]

Hi @UrielCh / @hezhangjian !

I hope you could relax after some exciting days 😃

I wanted to feedback two things that got my attention when contributing my last PR and I'm interested in what you think about it:

• I used IntelliJ for writing the code and obviously my formatter settings were a little odd and introduced several whitespace changes. What do you think about using a formatting tool like Spotless in your project and reformat the code once?
• I usually work with Gradle in my projects and didn't have Maven installed; that wouldn't be an issue if your projects would use the Maven wrapper to simplify setting up the project for newbies or one-time-contributors?

If you're interested in one or two of my ideas, I'm happy to raise a PR. 🙂

Cheers and thanks for your work!

Christopher

[UrielCh]

Please remove Maven from my codebase; I have disliked it for decades!

I would appreciate a migration to Gradle.

For any formatting updates, please create a separate PR. The formatter should be added without reformatting the code. A subsequent PR or commit can then be used to reformat the code.

[hezhangjian]

+1 for using spotless and others automatic tool.
+0 for migrate to gradle.

[ccudennec-otto]

Since migration to Gradle would be a bigger task, I've started by adding Maven wrapper + Spotless in #246

[ccudennec-otto]

Thanks for accepting the changes and merging! 🌻