diff --git a/java/build.gradle b/java/build.gradle
index 73a57f4..a50bd3c 100644
--- a/java/build.gradle
+++ b/java/build.gradle
@@ -1,6 +1,6 @@
 apply plugin: 'java'
 
-sourceCompatibility = 1.6
+sourceCompatibility = 1.7
 group = 'it.tug'
 version = '0.1'
 
diff --git a/java/src/main/java/it/tug/Main/Formatter.java b/java/src/main/java/it/tug/Main/Formatter.java
index abdeec4..92d91c6 100644
--- a/java/src/main/java/it/tug/Main/Formatter.java
+++ b/java/src/main/java/it/tug/Main/Formatter.java
@@ -10,13 +10,13 @@ public Formatter(Service service) {
 
     public String doTheJob(String theInput) {
         String response = service.askForPermission();
-        if (response == "FAIL") {
-            return "error";
-        } else if (response == "OK") {
-            return String.format("%s%s", theInput, theInput);
-        } else {
-            return null;
+        switch (response) {
+            case "FAIL":
+                return "error";
+            case "OK":
+                return String.format("%s%s", theInput, theInput);
+            default:
+                return null;
         }
     }
-
 }