diff --git a/src/main/java/net/onrc/onos/core/packet/IPv4.java b/src/main/java/net/onrc/onos/core/packet/IPv4.java
index f105428..1ce9eec 100644
--- a/src/main/java/net/onrc/onos/core/packet/IPv4.java
+++ b/src/main/java/net/onrc/onos/core/packet/IPv4.java
@@ -290,6 +290,7 @@
      * -headerLength : 0
      * -totalLength : 0
      */
+    @Override
     public byte[] serialize() {
         byte[] payloadData = null;
         if (payload != null) {
@@ -410,7 +411,7 @@
 
         int result = 0;
         for (int i = 0; i < 4; ++i) {
-            result |= Integer.valueOf(octets[i]) << ((3 - i) * 8);
+            result |= Integer.parseInt(octets[i]) << ((3 - i) * 8);
         }
         return result;
     }
@@ -443,7 +444,7 @@
         int result = 0;
         for (int i = 0; i < 4; ++i) {
             result = (ipAddress >> ((3 - i) * 8)) & 0xff;
-            sb.append(Integer.valueOf(result).toString());
+            sb.append(Integer.toString(result));
             if (i != 3) {
                 sb.append(".");
             }