How to remove all the content in a file in Kotlin?

In this tutorial, you shall learn how to remove all the content in a file in Kotlin using File.writeText() function, with example programs.

Kotlin – Remove all the content in a file

To remove all the content from a text file in Kotlin, you can overwrite the file with an empty string.

Steps to remove the content in a file

1. Consider that we have a text file identified by a given path.
2. Create a file object with the given path using java.io.File class, and write an empty string to file using File.writeText() function.

val file = File("path/to/text/file")
file.writeText("")

Example

For this example, we will consider a file named info.txt.

In the following program, we will remove all the content from the file info.txt, and make it empty.

Main.kt

import java.io.File

fun main() {
    val filePath = "info.txt"
    val file = File(filePath)
    file.writeText("")
    println("$filePath emptied successfully.")
}

Output

info.txt emptied successfully.

Reference tutorials for the above program

• Kotlin – Write text to file

Conclusion

In this Kotlin Tutorial, we learned how to remove all the content from a text file using File.writeText() function.