diff --git a/src/impl/Afficheur.java b/src/impl/Afficheur.java
index 43b445a..932b36e 100644
--- a/src/impl/Afficheur.java
+++ b/src/impl/Afficheur.java
@@ -2,10 +2,13 @@ package impl;
 
 import interfaces.Capteur;
 import interfaces.ObserverdeCapteur;
+
+import java.util.Random;
 import java.util.concurrent.Future;
 
 public class Afficheur implements ObserverdeCapteur {
     private Canal canalAsync;
+    private int id= new Random().nextInt(100);
 
     public Afficheur() {}
 
@@ -23,7 +26,7 @@ public class Afficheur implements ObserverdeCapteur {
         try{
             Future<Integer> futureValue= canalAsync.getValue();
             Integer value=futureValue.get();
-            System.out.println(value);
+            System.out.println("Afficheur " + id+", value: "+ value);
         }catch(Exception e){
             //TODO
             e.printStackTrace();
diff --git a/src/interfaces/Observer.java b/src/interfaces/Observer.java
deleted file mode 100644
index 99da751..0000000
--- a/src/interfaces/Observer.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package interfaces;
-public interface Observer<T> {
-    public void update(T subject);
-}
diff --git a/src/interfaces/ObserverdeCapteur.java b/src/interfaces/ObserverdeCapteur.java
index dc8451e..f1e9ded 100644
--- a/src/interfaces/ObserverdeCapteur.java
+++ b/src/interfaces/ObserverdeCapteur.java
@@ -1,6 +1,5 @@
 package interfaces;
-public interface ObserverdeCapteur extends Observer<Capteur>{
+public interface ObserverdeCapteur{
     //AO1 - servant
-    @Override
     public void update(Capteur subject);
 }
diff --git a/src/interfaces/Subject.java b/src/interfaces/Subject.java
deleted file mode 100644
index bec4e9d..0000000
--- a/src/interfaces/Subject.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package interfaces;
-public interface Subject {
-    public void attach(Observer o);
-    public void detach(Observer o);
-}