Github user ravipesala commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2375#discussion_r196305534
--- Diff:
core/src/main/java/org/apache/carbondata/core/util/CarbonUtil.java ---
@@ -17,12 +17,31 @@
package org.apache.carbondata.core.util;
-import java.io.*;
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.ObjectInputStream;
+import java.io.UnsupportedEncodingException;
import java.math.BigDecimal;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.security.PrivilegedExceptionAction;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
--- End diff --
use `import java.util.*;`
---
