Use Collection and iterator for class name access

Replace List usage with Collection for classNamesInPackage to match ClassDataRepository#getClassNamesInPackage return type. Use iterator().next() instead of get(0) to obtain a sample class name, and update imports accordingly to fix type/compile mismatch.

Author: mercyblitz

microsphere-java-core/src/main/java/io/microsphere/io/scanner/SimpleClassScanner.java

@@ -10,9 +10,9 @@
 
 import java.io.File;
 import java.net.URL;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
-import java.util.List;
 import java.util.Set;
 import java.util.function.Predicate;
 
@@ -130,10 +130,10 @@ public Set<Class<?>> scan(ClassLoader classLoader, String packageName, final boo
         if (resourceURLs.isEmpty()) {
             //Find in class path
             ClassDataRepository repository = ClassDataRepository.INSTANCE;
-            List<String> classNamesInPackage = newArrayList(repository.getClassNamesInPackage(packageName));
+            Collection<String> classNamesInPackage = repository.getClassNamesInPackage(packageName);
 
             if (!classNamesInPackage.isEmpty()) {
-                String classPath = repository.findClassPath(classNamesInPackage.get(0));
+                String classPath = repository.findClassPath(classNamesInPackage.iterator().next());
                 URL resourceURL = execute(() -> new File(classPath).toURI().toURL());
                 resourceURLs = new HashSet();
                 resourceURLs.add(resourceURL);