How to copy a file in Kotlin

How to copy a file in Kotlin.

Here's a detailed step-by-step tutorial on how to copy a file in Kotlin:

Import the necessary classes and methods:

import java.io.File
import java.io.FileInputStream
import java.io.FileOutputStream
import java.io.IOException

Create a function to copy the file:

fun copyFile(sourceFile: File, destinationFile: File) {
    try {
        // Create input and output streams
        val inputStream = FileInputStream(sourceFile)
        val outputStream = FileOutputStream(destinationFile)

        // Buffer to read data from the source file
        val buffer = ByteArray(1024)
        var length: Int

        // Read from the source file and write to the destination file
        while (inputStream.read(buffer).also { length = it } > 0) {
            outputStream.write(buffer, 0, length)
        }

        // Close the streams
        inputStream.close()
        outputStream.close()

        println("File copied successfully.")
    } catch (e: IOException) {
        println("An error occurred while copying the file.")
        e.printStackTrace()
    }
}

Create instances of the source and destination files:
```
val sourceFile = File("path/to/source/file.txt")
val destinationFile = File("path/to/destination/file.txt")
```
Replace "path/to/source/file.txt" with the actual path to your source file, and "path/to/destination/file.txt" with the desired path for the copied file.
Call the copyFile function and pass in the source and destination files:
```
copyFile(sourceFile, destinationFile)
```
This will copy the contents of the source file to the destination file.

That's it! You have successfully copied a file using Kotlin. You can modify the code as per your requirements, such as handling different file types or specifying different file paths.