BAEL-367 - Simplyfing code

core-java/src/main/java/com/baeldung/generics/Generics.java

@@ -13,9 +13,8 @@ public class Generics {
     }
 
     // definition of a generic method
-    public static <T, G> List<G> fromArrayToList(T[] a, List<G> list, Function<T, G> mapperFunction) {
-        List<T> listWithTypeT = Arrays.stream(a).collect(Collectors.toList());
-        return listWithTypeT.stream().map(mapperFunction).collect(Collectors.toList());
+    public static <T, G> List<G> fromArrayToList(T[] a, Function<T, G> mapperFunction) {
+        return Arrays.stream(a).map(mapperFunction).collect(Collectors.toList());
     }
 
     // example of a generic method that has Number as an upper bound for T

core-java/src/test/java/com/baeldung/generics/GenericsTest.java

@@ -24,8 +24,7 @@ public class GenericsTest {
     @Test
     public void givenArrayOfIntegers_thanListOfStringReturnedOK() {
         Integer[] intArray = { 1, 2, 3, 4, 5 };
-        List<String> stringList = new ArrayList<>();
-        stringList = Generics.fromArrayToList(intArray, stringList, Object::toString);
+        List<String> stringList = Generics.fromArrayToList(intArray, Object::toString);
         assertThat(stringList, hasItems("1", "2", "3", "4", "5"));
     }