[KTLN-702] Add Samples (#773)

* [KTLN-702] Add Samples

* [KTLN-702] Add Samples

Author: LeoColman

core-kotlin-modules/core-kotlin-files/src/main/kotlin/com/baeldung/bytearray/FileToByteArray.kt

@@ -0,0 +1,43 @@
+package com.baeldung.bytearray
+
+import java.io.BufferedOutputStream
+import java.io.File
+import java.io.FileOutputStream
+import java.io.IOException
+
+fun fileToByteArray(filePath: String): ByteArray {
+    val file = File(filePath)
+    return file.readBytes()
+}
+
+
+fun readFileUsingReader(filePath: String): ByteArray {
+    val file = File(filePath)
+    val contentBuilder = StringBuilder()
+
+    file.reader().use { reader ->
+        reader.forEachLine { line ->
+            contentBuilder.append(line).append("\n")
+        }
+    }
+
+    return contentBuilder.toString().toByteArray()
+}
+
+fun largeFileToByteArray(filePath: String, outputFilePath: String) {
+    File(filePath).bufferedReader().use { reader ->
+        BufferedOutputStream(FileOutputStream(outputFilePath)).use { bufferOut ->
+            reader.lineSequence()
+                .forEach { line -> bufferOut.write(line.toByteArray()) }
+        }
+    }
+}
+
+fun safeFileToByteArray(filePath: String): ByteArray? {
+    return try {
+        File(filePath).readBytes()
+    } catch (e: IOException) {
+        println("Error reading file: ${e.message}")
+        null
+    }
+}