[SCALA-508] Convert Byte Array to String in Scala (#556)

* [SCALA-508] Convert Byte Array to String in Scala

* [SCALA-508] Fixed unit test errors

* [SCALA-508] Fixed unit test errors

* [SCALA-508] Fixed unit failure

* [SCALA-508] Fixed unit failure

* [SCALA-508] Changing val names

---------

Co-authored-by: Callum Gibbons <[email protected]>

Author: cawpat

scala-strings/src/main/scala/com/baeldung/scala/strings/bytes/ByteArrayToString.scala

@@ -0,0 +1,32 @@
+package com.baeldung.scala.strings.bytes
+
+import java.nio.charset.StandardCharsets
+
+object ByteArrayToString {
+  def main(args: Array[String]): Unit = {
+    val helloInUtf8 = Array[Byte](104, 101, 108, 108, 111)
+    val helloInUtf16Le = Array[Byte](104, 0, 101, 0, 108, 0, 108, 0, 111, 0)
+
+    usingToString(helloInUtf8)
+    usingNewString(helloInUtf8)
+    usingToChar(helloInUtf8)
+    usingDifferentCharSet(helloInUtf16Le)
+  }
+
+  def usingToString(bytes: Array[Byte]) = {
+    bytes.toString()
+  }
+
+  def usingNewString(bytes: Array[Byte]) = {
+    new String(bytes, StandardCharsets.UTF_8)
+  }
+
+  def usingToChar(bytes: Array[Byte]) = {
+    bytes.map(_.toChar).mkString
+  }
+
+  def usingDifferentCharSet(bytes: Array[Byte]) = {
+    new String(bytes, StandardCharsets.UTF_16LE)
+  }
+
+}

scala-strings/src/test/scala/com/baeldung/scala/strings/bytes/ByteArrayToStringTest.scala

@@ -0,0 +1,25 @@
+package com.baeldung.scala.strings.bytes
+
+import com.baeldung.scala.strings.bytes.ByteArrayToString._
+import org.scalatest.matchers.must.Matchers
+import org.scalatest.wordspec.AnyWordSpec
+
+class ByteArrayToStringTest extends AnyWordSpec with Matchers {
+  "byte array" should {
+    val helloInUtf8 = Array[Byte](104, 101, 108, 108, 111)
+    val helloInUtf16Le = Array[Byte](104, 0, 101, 0, 108, 0, 108, 0, 111, 0)
+    val hello = "hello"
+
+    "return correct String for usingNewString" in {
+      usingNewString(helloInUtf8) mustBe hello
+    }
+
+    "return correct String for usingToChar" in {
+      usingToChar(helloInUtf8) mustBe hello
+    }
+
+    "return correct String for usingDifferentCharSet" in {
+      usingDifferentCharSet(helloInUtf16Le) mustBe hello
+    }
+  }
+}