কোটলিন ফাইল সিস্টেম

import java.io.File

fun main() {

  val file = File("./api/document.txt")
  val data = file.readText()

  println(data)
}

import java.io.File

fun main() {

  val file = File("./api/document.txt")

  if (file.exists()) {
    file.delete()
  }

  println("file delete successful")
}

import java.io.File

fun main() {

  val file = File("./api/document.txt")

  file.writeText("প্রোগ্রামিং শিখুন - প্রোগ্রামিং দিয়ে আপনার ক্যারিয়ার গড়ুন")

  println("file writing successful")
}

import java.io.File

fun main() {

  val file = File("./api/document.txt")
  val copy = File("./api/temp/doc.txt")

  file.copyTo(copy)

  println("file copy successful")
}

import java.io.File

fun main() {

  val source = File("./api/temp/doc.txt")
  val change = File("./api/temp/document.txt")

  source.renameTo(change)

  println("file rename successful")
}

import java.io.File

fun main() {

  val source = File("./api/temp/document.txt")
  val target = File("./api/root/document.txt")

  source.renameTo(target)

  println("file transfer successful")
}

import java.io.File

fun main() {

  val file = File("./api/document.txt")

  println(file.exists())
}

import java.io.File

fun main() {

  val file = File("./api/document.txt")

  println(file.length())
}