New Analysis Engine snapshot.

editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart

 library java.engine;
 
 class StringUtilities {
   static List<String> EMPTY_ARRAY = new List(0);
+  static String intern(String s) => s;
 }
 
 class FileNameUtilities {
   static String getExtension(String fileName) {
     if (fileName == null) {
       return "";
     }
     int index = fileName.lastIndexOf('.');
     if (index >= 0) {
       return fileName.substring(index + 1);
     }
     return "";
   }
 }
+
+class ArrayUtils {
+  static List addAll(List target, List source) {
+    List result = new List.from(target);
+    result.addAll(source);
+    return result;
+  }
+}
+
+class UUID {
+  static int __nextId = 0;
+  final String id;
+  UUID(this.id);
+  String toString() => id;
+  static UUID randomUUID() => new UUID((__nextId).toString());
+}