no bug

src/Restaurant.java

@@ -1,7 +1,11 @@
+import java.util.ArrayList;
+
 public class Restaurant {
     protected final int MAX_CLIENTS = 25;
     private int nbClient;
 
+    private ArrayList<Client> clients_stand = new ArrayList<Client>();
+
     private Compartiment[] buffet = new Compartiment[4];
     private Employe_du_buffet employeB;
 

src/Stand_de_cuisson.java

@@ -1,6 +1,17 @@
-public class Stand_de_cuisson {
-    public synchronized void attendClient(){
-        
+import java.util.LinkedList;
+import java.util.Queue;
+
+public class Stand_de_cuisson { 
+    private Queue<Client> clients = new LinkedList<Client>();
+    public synchronized Client attendClient(){
+        while(clients.isEmpty()){
+            try{
+                wait();
+            }catch (Exception e) {
+                System.out.println(e);
+            }
+        }
+        return clients.poll();
     }
     public synchronized void finir_cuit(Client client){
         notifyAll();