Scala 文件 I/O

import java.io._

object Demo {
   def main(args: Array[String]) {
      val writer = new PrintWriter(new File("test.txt" ))

      writer.write("Hello Scala")
      writer.close()
   }
}

>scalac Demo.scala
\>scala Demo

Hello Scala

object Demo {
   def main(args: Array[String]) {
      print("Please enter your input : " )
      val line = Console.readLine

      println("Thanks, you just typed: " + line)
   }
}

>scalac Demo.scala
\>scala Demo

Please enter your input : Scala is great
Thanks, you just typed: Scala is great

import scala.io.Source

object Demo {
   def main(args: Array[String]) {
      println("Following is the content read:" )

      Source.fromFile("Demo.txt" ).foreach { 
         print 
      }
   }
}

>scalac Demo.scala
\>scala Demo

Following is the content read:
Hello Scala