SDAP-199 equals() is used for String comparison. (#50)

diff --git a/core/src/main/java/org/apache/sdap/mudrod/weblog/structure/log/RequestUrl.java b/core/src/main/java/org/apache/sdap/mudrod/weblog/structure/log/RequestUrl.java
index 895f792..9c94dfe 100644
--- a/core/src/main/java/org/apache/sdap/mudrod/weblog/structure/log/RequestUrl.java
+++ b/core/src/main/java/org/apache/sdap/mudrod/weblog/structure/log/RequestUrl.java
@@ -108,8 +108,7 @@
         mapRequest.put(arrSplitEqual[0], arrSplitEqual[1]);
 
       } else {
-        if (arrSplitEqual[0] != "") {
-
+        if (!arrSplitEqual[0].equals("")) {
           mapRequest.put(arrSplitEqual[0], "");
         }
       }