How to log a Java application?

Question

Java

Hello. I am studying logging, and have not yet figured out how best to do logging. In a sense, it is not clear which strategy to choose. Either at the beginning of each method, call the logger info method + call the error method in exceptions, or even use a separate object (or objects) for logging by proxy object type. Is it somehow better to organize logging in the code. Tell me who knows.
For the rest, I have no questions yet (at least for the rest there is quite a lot of information, but I have not found anything on this yet).

Answer 1

Log everything you need, divide into INFO/WARN/ERROR/DEBUG/TRACE/CRITICAL levels. Use a standard logger, you can tie log4j. In the application settings, you can always specify the logging level and subclasses, without recompilation.