CODEWITHSUNDEEP
javascala
bsky
bsky

Reputation: 20222

Can not redirect STDIN/STDOUT

I have the following Scala code:

import java.io.{FileInputStream, PrintStream, FileOutputStream}

object bulbs {

  def main(args: Array[String]): Unit = {

    System.setIn(new FileInputStream("./bulbs.in"))
    System.setOut(new PrintStream(new FileOutputStream("./bulbs.out")))

  }
}

As you can see, this uses Java classes to redirect STDIN, STDOUT to bulbs.in and bulbs.out. These files are in the same folder, and the name is spelled correctly.

However, I still get:

Exception in thread "main" java.io.FileNotFoundException: ./bulbs.in (No such file or directory)

I have also tried using "bulbs.in" rather than "./bulbs.in"

Why is this happening?

Upvotes: 0

Views: 53

Answers (2)

nikiforo
nikiforo

Reputation: 424

You can use both:

"bulbs.in"
"./bulbs.in"

You can also view directory that is searched for file with property

System.getProperty("user.dir")

Upvotes: 1

Peter Lawrey
Peter Lawrey

Reputation: 533530

The file is not in the directory you are trying to read it from.

Note, it is usually better to do this redirection on the command line and leave it up to the caller.

Upvotes: 2

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