diff --git a/sharding-jdbc-core/src/main/java/io/shardingjdbc/core/merger/ResultSetMerger.java b/sharding-jdbc-core/src/main/java/io/shardingjdbc/core/merger/ResultSetMerger.java
index d350613175d098670c0c3d0d61ddb4983d3dcd9b..78db5eef60529e9c4a81ff74496f6ed3e3938ac3 100644
--- a/sharding-jdbc-core/src/main/java/io/shardingjdbc/core/merger/ResultSetMerger.java
+++ b/sharding-jdbc-core/src/main/java/io/shardingjdbc/core/merger/ResultSetMerger.java
@@ -44,7 +44,7 @@ public interface ResultSetMerger {
      * @return data value
      * @throws SQLException SQL Exception
      */
-    Object getValue(final int columnIndex, final Class<?> type) throws SQLException;
+    Object getValue(int columnIndex, Class<?> type) throws SQLException;
     
     /**
      * Get data value.
@@ -54,7 +54,7 @@ public interface ResultSetMerger {
      * @return data value
      * @throws SQLException SQL Exception
      */
-    Object getValue(final String columnLabel, final Class<?> type) throws SQLException;
+    Object getValue(String columnLabel, Class<?> type) throws SQLException;
     
     /**
      * Get calendar value.
@@ -65,7 +65,7 @@ public interface ResultSetMerger {
      * @return calendar value
      * @throws SQLException SQL Exception
      */
-    Object getCalendarValue(final int columnIndex, final Class<?> type, final Calendar calendar) throws SQLException;
+    Object getCalendarValue(int columnIndex, Class<?> type, Calendar calendar) throws SQLException;
     
     /**
      * Get calendar value.
@@ -76,7 +76,7 @@ public interface ResultSetMerger {
      * @return calendar value
      * @throws SQLException SQL Exception
      */
-    Object getCalendarValue(final String columnLabel, final Class<?> type, final Calendar calendar) throws SQLException;
+    Object getCalendarValue(String columnLabel, Class<?> type, Calendar calendar) throws SQLException;
     
     /**
      * Get InputStream.
@@ -86,7 +86,7 @@ public interface ResultSetMerger {
      * @return InputStream
      * @throws SQLException SQL Exception
      */
-    InputStream getInputStream(final int columnIndex, final String type) throws SQLException;
+    InputStream getInputStream(int columnIndex, String type) throws SQLException;
     
     /**
      * Get InputStream.
@@ -96,7 +96,7 @@ public interface ResultSetMerger {
      * @return InputStream
      * @throws SQLException SQL Exception
      */
-    InputStream getInputStream(final String columnLabel, final String type) throws SQLException;
+    InputStream getInputStream(String columnLabel, String type) throws SQLException;
     
     /**
      * Adjust ResultSet is null or not.
diff --git a/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLReceivedPacket.java b/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLReceivedPacket.java
index c61c6abae43677fea3245bf3dc80cf251f1cfcb7..0659a5c3520afd8c622f13ffbf67116d5282a010 100644
--- a/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLReceivedPacket.java
+++ b/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLReceivedPacket.java
@@ -14,5 +14,5 @@ public abstract class AbstractMySQLReceivedPacket extends AbstractMySQLPacket {
      * 
      * @return instance of received packet
      */
-    public abstract AbstractMySQLReceivedPacket read(final MySQLPacketPayload mysqlPacketPayload);
+    public abstract AbstractMySQLReceivedPacket read(MySQLPacketPayload mysqlPacketPayload);
 }
diff --git a/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLSentPacket.java b/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLSentPacket.java
index 4e9b1f37fea3821d560f550d7de2b8ad7d7198db..a970849fd70fb6d2c7264354b0b20891168b878a 100644
--- a/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLSentPacket.java
+++ b/sharding-jdbc-server/src/main/java/io/shardingjdbc/server/packet/AbstractMySQLSentPacket.java
@@ -12,5 +12,5 @@ public abstract class AbstractMySQLSentPacket extends AbstractMySQLPacket {
      * 
      * @param mysqlPacketPayload packet payload to be write
      */
-    public abstract void write(final MySQLPacketPayload mysqlPacketPayload);
+    public abstract void write(MySQLPacketPayload mysqlPacketPayload);
 }