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copied!<p>Edit (September 2011): since <a href="https://stackoverflow.com/users/608693/eduardo-costa">Eduardo Costa</a> asks about Scala2.9, and since <a href="https://stackoverflow.com/users/204313/rick-777">Rick-777</a> comments that <a href="https://github.com/eengbrec/Scalax.IO/commits/master" rel="nofollow noreferrer">scalax.IO commit history</a> is pretty much non-existent since mid-2009...</p> <p><strong><a href="http://jesseeichar.github.io/scala-io-doc/0.4.3/index.html#!/overview" rel="nofollow noreferrer">Scala-IO</a></strong> has changed place: see its <a href="https://github.com/jesseeichar/scala-io" rel="nofollow noreferrer">GitHub repo</a>, from <a href="https://github.com/jesseeichar" rel="nofollow noreferrer">Jesse Eichar</a> (also <a href="https://stackoverflow.com/users/150272/jesse-eichar">on SO</a>):</p> <blockquote> <p>The Scala IO umbrella project consists of a few sub projects for different aspects and extensions of IO.<br> There are two main components of Scala IO:</p> <ul> <li><strong>Core</strong> - Core primarily deals with Reading and writing data to and from arbitrary sources and sinks. The corner stone traits are <code>Input</code>, <code>Output</code> and <code>Seekable</code> which provide the core API.<br> Other classes of importance are <code>Resource</code>, <code>ReadChars</code> and <code>WriteChars</code>.</li> <li><strong>File</strong> - File is a <code>File</code> (called <code>Path</code>) API that is based on a combination of Java 7 NIO filesystem and SBT PathFinder APIs.<br> <code>Path</code> and <code>FileSystem</code> are the main entry points into the Scala IO File API.</li> </ul> </blockquote> <pre><code>import scalax.io._ val output:Output = Resource.fromFile("someFile") // Note: each write will open a new connection to file and // each write is executed at the begining of the file, // so in this case the last write will be the contents of the file. // See Seekable for append and patching files // Also See openOutput for performing several writes with a single connection output.writeIntsAsBytes(1,2,3) output.write("hello")(Codec.UTF8) output.writeStrings(List("hello","world")," ")(Codec.UTF8) </code></pre> <hr> <p>Original answer (January 2011), with the old place for scala-io:</p> <p>If you don't want to wait for Scala2.9, you can use the <a href="https://github.com/scala-incubator/scala-io" rel="nofollow noreferrer">scala-incubator / scala-io</a> library.<br> (as mentioned in "<a href="https://stackoverflow.com/questions/1762843/why-doesnt-scala-source-close-the-underlying-inputstream">Why doesn't Scala Source close the underlying InputStream?</a>")</p> <p>See <a href="https://github.com/scala-incubator/scala-io/blob/master/scala-io/src/samples/samples.scala" rel="nofollow noreferrer">the samples</a></p> <pre><code>{ // several examples of writing data import scalax.io.{ FileOps, Path, Codec, OpenOption} // the codec must be defined either as a parameter of ops methods or as an implicit implicit val codec = scalax.io.Codec.UTF8 val file: FileOps = Path ("file") // write bytes // By default the file write will replace // an existing file with the new data file.write (Array (1,2,3) map ( _.toByte)) // another option for write is openOptions which allows the caller // to specify in detail how the write should take place // the openOptions parameter takes a collections of OpenOptions objects // which are filesystem specific in general but the standard options // are defined in the OpenOption object // in addition to the definition common collections are also defined // WriteAppend for example is a List(Create, Append, Write) file.write (List (1,2,3) map (_.toByte)) // write a string to the file file.write("Hello my dear file") // with all options (these are the default options explicitely declared) file.write("Hello my dear file")(codec = Codec.UTF8) // Convert several strings to the file // same options apply as for write file.writeStrings( "It costs" :: "one" :: "dollar" :: Nil) // Now all options file.writeStrings("It costs" :: "one" :: "dollar" :: Nil, separator="||\n||")(codec = Codec.UTF8) } </code></pre>

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