1 files changed, 3 insertions, 3 deletions
diff --git a/core/src/main/scala/org/apache/spark/util/collection/OpenHashMap.scala b/core/src/main/scala/org/apache/spark/util/collection/OpenHashMap.scala
index b8de4ff9aa..c52591b352 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/OpenHashMap.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/OpenHashMap.scala
@@ -109,7 +109,7 @@ class OpenHashMap[K : ClassTag, @specialized(Long, Int, Double) V: ClassTag](
     }
   }
 
-  override def iterator = new Iterator[(K, V)] {
+  override def iterator: Iterator[(K, V)] = new Iterator[(K, V)] {
     var pos = -1
     var nextPair: (K, V) = computeNextPair()
 
@@ -132,9 +132,9 @@ class OpenHashMap[K : ClassTag, @specialized(Long, Int, Double) V: ClassTag](
       }
     }
 
-    def hasNext = nextPair != null
+    def hasNext: Boolean = nextPair != null
 
-    def next() = {
+    def next(): (K, V) = {
       val pair = nextPair
       nextPair = computeNextPair()
       pair