This post was brought to you by this PMD rule.
Transcription
Why do we have this stupid code analyzer rule enabled anyway? Nobody writes code like this...
After telling them the lore why it's there:
You have seen such things before?
11 Times, as a matter of fact
So what is the reason for doing it that way?
I think this is just a picky optimization.
The first one runs the constructor to instantiate a new string, then gets its class (which is presumably a static property anyway). The second doesn’t have to run any constructor and just grabs the static class name from the type.
Maybe there’s more implementation nuance here but it seems like an opinionated rule that has zero effect on performance unless that code is being called thousands of times every second. And even then the compiler probably optimizes them to the same code anyway.
It's not picky, needlessly creating objects makes the garbage collector run a lot more. Especially if it's invoked frequently like Minecraft recreating the object for every block on the screen for every frame to render. The garbage collector is largely responsible for lag of up to a second occurring at random times.