What does “=>” mean in import in scala?(转自*问答)

As others have mentioned, it's an import rename. There is however one further feature that proves astoundingly-useful on occasion that I would like to highlight: If you "rename" to _, the symbol is no longer imported. This is useful in a few cases. The simplest is that you'd like to do a wildcard import from two packages, but there's a name that's defined in both and you're only interested in one of them: import java.io.{ File=>_, _ } import somelibrary._ Now when you reference File, it will unambiguously use the somelibrary.File without having to fully-qualify it. In that case, you could have also renamed java.io.File to another name to get it out of the way, but sometimes you really do not want a name visible at all. This is the case for packages that contain implicits. If you do not want a particular implicit conversion (e.g. if you'd rather have a compile error) then you have to delete its name completely: import somelibrary.{RichFile => _, _} // Files now won't become surprise RichFiles

参考链接：

https://*.com/questions/31652959/what-does-mean-in-import-in-scala