gistfile1.txt

diff --git a/generator/java.stoneg.py b/generator/java.stoneg.py
index dda20b58..38df2fe8 100644
--- a/generator/java.stoneg.py
+++ b/generator/java.stoneg.py
@@ -49,8 +49,8 @@ from stone.data_type import (
     Void,
 )
 
-class StoneType:
-    __metaclass__ = abc.ABCMeta
+class StoneType(metaclass=abc.ABCMeta):
+    pass
 
 StoneType.register(ApiNamespace)
 StoneType.register(ApiRoute)
@@ -2264,7 +2264,7 @@ class JavaReference(object):
 
     def _as_json(self):
         dct = {}
-        for k, v in self.__dict__.iteritems():
+        for k, v in self.__dict__.items():
             # avoid cyclic references issue
             if isinstance(v, JavaReference):
                 dct[k] = v.fq_name