Core Java 8 refactor (#3342)

core-java-8/src/main/java/com/baeldung/stream/Product.java

@@ -1,4 +1,4 @@
-package com.baeldung.streamApi;
+package com.baeldung.stream;
 
 import java.util.List;
 import java.util.stream.Stream;

core-java-8/src/main/java/com/baeldung/stream/StreamApi.java

@@ -16,7 +16,7 @@ public class StreamApi {
     }
     
     public static String getLastElementUsingSkip(List<String> valueList) {
-        long count = valueList.stream().count();
+        long count = (long) valueList.size();
         Stream<String> stream = valueList.stream();
         return stream.skip(count - 1).findFirst().orElse(null);
     }

core-java-8/src/test/java/com/baeldung/java8/Java8StreamApiUnitTest.java

@@ -1,6 +1,6 @@
 package com.baeldung.java8;
 
-import com.baeldung.streamApi.Product;
+import com.baeldung.stream.Product;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.Logger;

core-java-8/src/test/java/com/baeldung/stream/PrimitiveStreamsUnitTest.java

@@ -6,6 +6,7 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
+import java.util.stream.Stream;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
@@ -65,7 +66,9 @@ public class PrimitiveStreamsUnitTest {
     @Test
     public void givenAnArrayWhenSumIsCalledThenTheCorrectSumIsReturned() {
 
-        int sum = Arrays.asList(33,45).stream().mapToInt(a -> a).sum();
+        int sum = Stream.of(33,45)
+          .mapToInt(i -> i)
+          .sum();
 
         assertEquals(78, sum);
     }