Write a Kotlin Program to Convert OutputStream to String

In Kotlin, it is possible to convert an OutputStream to a String using the standard library.

The process involves creating a ByteArrayOutputStream to capture the output, then converting the contents to a string.

To begin, import the necessary classes:

import java.io.ByteArrayOutputStream
import java.nio.charset.Charset

Next, create an instance of ByteArrayOutputStream and write to it using the OutputStream’s write() method:

val outputStream = ByteArrayOutputStream()
outputStream.write("Hello, World!".toByteArray(Charset.defaultCharset()))

Note that the write() method takes in a ByteArray, so the string must be converted to a byte array first.

Finally, call the ByteArrayOutputStream’s toString() method to convert the contents to a String:

val result = outputStream.toString(Charset.defaultCharset())

The Charset argument is optional, but it is recommended to specify it to avoid any unexpected character encoding issues.

Here is the full code:

import java.io.ByteArrayOutputStream
import java.nio.charset.Charset

fun main() {
val outputStream = ByteArrayOutputStream()
outputStream.write("Hello, World!".toByteArray(Charset.defaultCharset()))
val result = outputStream.toString(Charset.defaultCharset())
println(result)
}

This will output:

Hello, World!

In conclusion, converting an OutputStream to a String in Kotlin involves using a ByteArrayOutputStream to capture the output and calling its toString() method to convert the contents to a String. Make sure to specify the Charset to avoid any encoding issues.