[SCALA-339] - Changed classes to objects

Author: Callum Gibbons

scala-core-modules/scala-core-10/src/main/scala/com/baeldung/scala/valsintraits/ValInTraitExamples.scala

@@ -7,17 +7,17 @@ object ValInTraitExamples {
     val currentTime: LocalDateTime
     def printCurrentTime(): Unit
   }
-  class TimePrinterImpl extends CurrentTimePrinter {
-    override val currentTime: LocalDateTime = LocalDateTime.now()
+  object TimePrinterImpl extends CurrentTimePrinter {
+    override def currentTime: LocalDateTime = LocalDateTime.now()
     override def printCurrentTime(): Unit = println(currentTime)
   }
 
   trait CurrentTimePrinterWithDef {
     def currentTime: LocalDateTime
     def printCurrentTime(): Unit
   }
-  class TimePrinterWithDefImpl extends CurrentTimePrinterWithDef {
-    override def currentTime: LocalDateTime = LocalDateTime.now()
+  object TimePrinterWithDefImpl extends CurrentTimePrinterWithDef {
+    override var currentTime: LocalDateTime = LocalDateTime.now()
     override def printCurrentTime(): Unit = println(currentTime)
   }
 

scala-core-modules/scala-core-10/src/test/scala/com/baeldung/scala/ValInTraitExamplesUnitTest.scala

@@ -6,7 +6,7 @@ import org.scalatest.matchers.should.Matchers
 
 class ValInTraitExamplesUnitTest extends AnyFlatSpec with Matchers {
   "TimePrinterImpl" should "return same time every call" in {
-    val printer = new ValInTraitExamples.TimePrinterImpl()
+    val printer = ValInTraitExamples.TimePrinterImpl
     val first = printer.currentTime
     Thread.sleep(10)
     val second = printer.currentTime
@@ -15,7 +15,7 @@ class ValInTraitExamplesUnitTest extends AnyFlatSpec with Matchers {
   }
 
   "TimePrinterWithDefImpl" should "return different time every call" in {
-    val printer = new ValInTraitExamples.TimePrinterWithDefImpl()
+    val printer = ValInTraitExamples.TimePrinterWithDefImpl
     val first = printer.currentTime
     Thread.sleep(10)
     val second = printer.currentTime