Читать книгу OCP Oracle Certified Professional Java SE 17 Developer Study Guide - Jeanne Boyarsky - Страница 115

The var keyword is great for exam authors because it makes it easier to write tricky code. When you work on a real project, you want the code to be easy to read.

Once you start having code that looks like the following, it is time to consider using var:

PileOfPapersToFileInFilingCabinet pileOfPapersToFile = new PileOfPapersToFileInFilingCabinet();

You can see how shortening this would be an improvement without losing any information:

var pileOfPapersToFile = new PileOfPapersToFileInFilingCabinet();

If you are ever unsure whether it is appropriate to use var, we recommend “Local Variable Type Inference: Style Guidelines,” which is available at the following location.

https://openjdk.java.net/projects/amber/LVTIstyle.html