Kotlin Programming Cookbook

How to do it…

In the following steps, we will learn how to use BufferedReader to read all lines of a file:

1. Let's start with getting the InputStream of our file and use the BufferedReader on it to read the contents of the file in one go:

import java.io.Fileimport java.io.InputStreamfun main(args: Array<String>) {    val inputStream: InputStream = File("lorem.txt").inputStream()    val inputString = inputStream.bufferedReader().use {     it.readText() }    println(inputString)}

2. The output, in this case, will be the exact same as the file, depending on the charset of course, if we use it. Here's an example where we use another charset:

import java.io.Fileimport java.io.InputStreamfun main(args: Array<String>) { val inputStream: InputStream = File("lorem.txt").inputStream() ...