Kotlin – Write List of Strings as Lines in a File

Kotlin – Write List of Strings as Lines in a File

To write a list of strings as lines in a text file, you can use printWriter() method. These methods facilitate writing each element of the list to a new line in the file.

In this tutorial, we will show you how to write a list of strings to a file in Kotlin, with each string on a separate line, with an example.

Steps to Write a List of Strings as Lines in a File in Kotlin

To write a list of strings to a text file in Kotlin, follow these steps:

1. Import the File class from the java.io package.
2. Create a File object with the desired file path and name.
3. Use printWriter() method to write each string in the list to a new line in the file.

Kotlin Example Program to Write a List of Strings to a File

In the following example program, we will write a list of strings to a file named 'output.txt', with each string on a new line.

Main.kt

import java.io.File

fun main() {
    val filePath = "output.txt" // Replace with the desired file path
    val lines = listOf("Line 1", "Line 2", "Line 3")
    val file = File(filePath)

    file.printWriter().use { out ->
        lines.forEach { line ->
            out.println(line)
        }
    }

    println("List of strings written to file successfully.")
}

Output

List of strings written to file successfully.

The output will confirm that the list of strings has been written to the file, each on a new line.

Summary

In this Kotlin tutorial, we learned how to write a list of strings to a text file, with each string as a separate line using File.printWriter(), with an example.