Kotlin – Check if File exists – Example

Kotlin – Check if File exists

To check if a file already exists, in Kotlin, use exists() function of the java.io.File class. File.exists() returns a Boolean value of true if the file exists, or false if the file does not exist.

Example

In the following example we shall check if the file "data.txt" exists.

Main.kt

import java.io.File

fun main(args: Array<String>) {
    val fileName = "data.txt"
    var file = File(fileName)
    var fileExists = file.exists()

    if(fileExists){
        print("$fileName exists.")
    } else {
        print("$fileName does not exist.")
    }
}

Output

data.txt exists.

Conclusion

In this Kotlin Tutorial, we learned how to check if a File exists using File.exists() method.