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Asked: 2026-05-26T02:21:23+00:00

How do you instantiate a scala.util.parsing.input.Reader to read from a file? The API mentions

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How do you instantiate a scala.util.parsing.input.Reader to read from a file? The API mentions in passing something about PagedSeq and java.io.Reader, but it’s not clear at all how to accomplish that.

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  1. Editorial Team

    You create a FileInputStream, pass that to an InputStreamReader and pass that to the apply method of the StreamReader companion object, which returns a StreamReader, a subtype of Reader.

    scala> import scala.util.parsing.input.{StreamReader,Reader}
import scala.util.parsing.input.{StreamReader, Reader}

scala> import java.io._
import java.io._

scala> StreamReader(new InputStreamReader(new FileInputStream("test")))
res0: scala.util.parsing.input.StreamReader = scala.util.parsing.input.StreamReader@1e5a0cb
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