Scala Note 14: Read and Write Files

1. Read from a file

import scala.io._
Source.fromFile(new java.io.File("input.txt")).getLines().foreach(println)

2. Write to a file

val f = new FileOutputStream("output.txt").getChannel

f write ByteBuffer.wrap("Hello".getBytes)

f close

3. Copy files

val in  = new FileInputStream("input.txt").getChannel

val out = new FileOutputStream("output.txt").getChannel

in transferTo (0, in.size, out)