diff --git a/core/src/main/scala/org/apache/spark/annotation/AlphaComponent.java b/core/src/main/java/org/apache/spark/annotation/AlphaComponent.java
similarity index 100%
rename from core/src/main/scala/org/apache/spark/annotation/AlphaComponent.java
rename to core/src/main/java/org/apache/spark/annotation/AlphaComponent.java
diff --git a/core/src/main/scala/org/apache/spark/annotation/DeveloperApi.java b/core/src/main/java/org/apache/spark/annotation/DeveloperApi.java
similarity index 100%
rename from core/src/main/scala/org/apache/spark/annotation/DeveloperApi.java
rename to core/src/main/java/org/apache/spark/annotation/DeveloperApi.java
diff --git a/core/src/main/scala/org/apache/spark/annotation/Experimental.java b/core/src/main/java/org/apache/spark/annotation/Experimental.java
similarity index 100%
rename from core/src/main/scala/org/apache/spark/annotation/Experimental.java
rename to core/src/main/java/org/apache/spark/annotation/Experimental.java
diff --git a/core/src/main/scala/org/apache/spark/annotation/Private.java b/core/src/main/java/org/apache/spark/annotation/Private.java
similarity index 100%
rename from core/src/main/scala/org/apache/spark/annotation/Private.java
rename to core/src/main/java/org/apache/spark/annotation/Private.java
diff --git a/graphx/src/main/scala/org/apache/spark/graphx/TripletFields.java b/graphx/src/main/java/org/apache/spark/graphx/TripletFields.java
similarity index 100%
rename from graphx/src/main/scala/org/apache/spark/graphx/TripletFields.java
rename to graphx/src/main/java/org/apache/spark/graphx/TripletFields.java
diff --git a/graphx/src/main/scala/org/apache/spark/graphx/impl/EdgeActiveness.java b/graphx/src/main/java/org/apache/spark/graphx/impl/EdgeActiveness.java
similarity index 100%
rename from graphx/src/main/scala/org/apache/spark/graphx/impl/EdgeActiveness.java
rename to graphx/src/main/java/org/apache/spark/graphx/impl/EdgeActiveness.java
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/SQLUserDefinedType.java b/sql/catalyst/src/main/java/org/apache/spark/sql/types/SQLUserDefinedType.java
similarity index 100%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/types/SQLUserDefinedType.java
rename to sql/catalyst/src/main/java/org/apache/spark/sql/types/SQLUserDefinedType.java
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContextState.java b/streaming/src/main/java/org/apache/spark/streaming/StreamingContextState.java
similarity index 100%
rename from streaming/src/main/scala/org/apache/spark/streaming/StreamingContextState.java
rename to streaming/src/main/java/org/apache/spark/streaming/StreamingContextState.java