There's a "Code" button on our message editor. When you want to supply examples of pre-formatted text such as
Java or XML, it can wrap tags around the sample text to keep it readable.
Your actual error message says that there's a compilation error in the ButtonApplet.java file. Just a regular compile error, not Maven-related.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.