Scala File Handling

by Online Tutorials Library July 14, 2022

Scala File handling

Scala provides predefined methods to deal with file. You can create, open, write and read file. Scala provides a complete package scala.io for file handling.

In this chapter, we will discuss all these file operations in detail.

Scala Creating a File Example

Scala doesn’t provide file writing methods. So, you have to use the Java PrintWriter or FileWriter methods.

 import java.io._ val fileObject = new File(“ScalaFile.txt” )// Creating a file val printWriter = new PrintWriter(fileObject)// Passing reference of file to the printwriter printWriter.write(“Hello, This is scala file”)// Writing to the file printWriter.close()// Closing printwriter 

The above code will create a text file ScalaFile.txt. After creating file printwriter is used to write content to this file.

Scala Reading File Example: Reading Each Charecter

 import scala.io.Source  object MainObject{   def main(args:Array[String]){     val filename = “ScalaFile.txt”     val fileSource = Source.fromFile(filename)     while(fileSource.hasNext){       println(fileSource.next)     }     fileSource.close()   } } 

Output:

H e l l o ,   T h i s   i s   s c a l a   f i l e

Scala provides file reading methods. In the above code, we have imported scala.io package and Source class is used to access file related methods like fromFile().

You must close file refernce after reading or writing file by using close() method.

Scala Reading a File Example: Reading Each Line

 import scala.io.Source object MainObject{   def main(args:Array[String]){     val filename = “ScalaFile.txt”     val fileSource = Source.fromFile(filename)     for(line<-fileSource.getLines){       println(line)     }     fileSource.close()   } } 

Output:

Hello, This is scala file

Apart from these for all kind of file handling operations, you need to use java.io package to access file methods.

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Scala Reading File Example: Reading Each Charecter

Scala Reading a File Example: Reading Each Line

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