Recently, I came across a scenario where I had to log a list of entries whenever that list was not empty. Basically, I was removing invalid data that I have received from outside and I wanted to warn about this in a case users would complain they are missing these entries.
Anyway, I had to do an equivalent of this several times in a row:
if (anyCondition) {
logger.warn("Hey, something is not okay!");
}
IMPORANT! This is my thought experiment, which may or may not be valid. Feel free to comment and give your insights, but think twice before using any of my custom solutions in your code! Always prefer using language's functionality if possible.
There are specific use cases where you always have to check if a variable is null, for example, when working with database:
Connection connection = null;
PreparedStatement statement = null;