如何在 Scala 中从导入中排除/重命名某些类?

问题描述：

import scala.collection.mutable.{_, Map => _, Set => _}

应该从包scala.collection.mutable中导入所有类，除了Map和Set.但它给了我这个错误:

should import all classes from package scala.collection.mutable, except Map and Set. But it gives me this error:

error: '}' expected but ',' found.
       import scala.collection.mutable.{_, Map => _, Set => _}

还有办法做到这一点吗?

Is there still a way to do this?

答

_ 必须放在结尾 - 而不是开头:

The _ has to be put at the end - not at the beginning:

从导入中排除 Map 和 Set

import scala.collection.mutable.{Map => _, Set => _, _}

排除 Set 并将 Map 重命名为 ScalaMutableMap

import scala.collection.mutable.{Map=>ScalaMutableMap, Set => _, _}

在Scala参考中查看详细信息，第 50 页，第 4.7 段

See the detailed info in Scala Refererence, page 50, paragraph 4.7