added sample on array conversion

Author: Mikalai Alimenkou

src/com/xpinjection/java8/misused/stream/StreamMayBeConvertedToArray.java

@@ -0,0 +1,29 @@
+package com.xpinjection.java8.misused.stream;
+
+import com.xpinjection.java8.misused.Annotations.Good;
+import com.xpinjection.java8.misused.Annotations.Ugly;
+import com.xpinjection.java8.misused.User;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class StreamMayBeConvertedToArray {
+ @Ugly
+ class ConvertToArrayViaList {
+ public String[] getUserNames(List<User> users) {
+ List<String> names = users.stream()
+ .map(User::getName)
+ .collect(Collectors.toList());
+ return names.toArray(new String[names.size()]);
+ }
+ }
+
+ @Good
+ class ConvertToArrayDirectly {
+ public String[] getUserNames(List<User> users) {
+ return users.stream()
+ .map(User::getName)
+ .toArray(String[]::new);
+ }
+ }
+}