From b5f02d6743ecb1633b7b13382f76cb8bfc2aa95c Mon Sep 17 00:00:00 2001
From: Dongjoon Hyun <dongjoon@apache.org>
Date: Thu, 3 Mar 2016 10:12:32 +0000
Subject: [SPARK-13583][CORE][STREAMING] Remove unused imports and add
 checkstyle rule

## What changes were proposed in this pull request?

After SPARK-6990, `dev/lint-java` keeps Java code healthy and helps PR review by saving much time.
This issue aims remove unused imports from Java/Scala code and add `UnusedImports` checkstyle rule to help developers.

## How was this patch tested?
```
./dev/lint-java
./build/sbt compile
```

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #11438 from dongjoon-hyun/SPARK-13583.
---
 checkstyle.xml | 1 +
 1 file changed, 1 insertion(+)

(limited to 'checkstyle.xml')

diff --git a/checkstyle.xml b/checkstyle.xml
index b5d1617ba4..a165fee2a4 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -166,5 +166,6 @@
             <property name="exceptionVariableName" value="expected"/>
         </module>
         <module name="CommentsIndentation"/>
+        <module name="UnusedImports"/>
     </module>
 </module>
-- 
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