new scheduler still not working

nbproject/project.properties

@@ -1,4 +1,4 @@
-#Wed, 19 Dec 2018 18:53:48 +0100
+#Thu, 20 Dec 2018 09:38:26 +0100
 annotation.processing.enabled=true
 annotation.processing.enabled.in.editor=false
 annotation.processing.processors.list=

src/opensesim/trader/SimpleTrader.java

@@ -87,7 +87,7 @@ public class SimpleTrader extends AbstractTrader implements EventListener{
     @Override
     public long receive(Event task) {
         System.out.printf("Here we are !!! %f\n", getWorld().randNextFloat(12f, 27f));
-     //   getWorld().schedule(this, 100);        
+     getWorld().schedule(this, 5000);        
         return -1;
     }
     

src/opensesim/world/scheduler/Scheduler.java

@@ -62,7 +62,7 @@ public class Scheduler {
                     }
                 }
                 Event e = getNextEvent();
-                if (e==null){
+                if (e == null) {
                     continue;
                 }
 
@@ -92,12 +92,23 @@ public class Scheduler {
         }
     }
 
-    public synchronized Event startTimerTask(EventListener listener, long time) {
+    public Event startTimerTask(EventListener listener, long time) {
-        //    Event e = schedulers.get(next++).startTimerTask(listener, time);
+        Event e = new Event(listener);
-//        if (next == schedulers.size()) {
+        long t = time + clock.currentTimeMillis();
-        //          next = 0;
+        synchronized (event_queue) {
-        //    }
+            LinkedList<Event> s = event_queue.get(t);
-        return null;
+            if (s == null) {
+                s = new LinkedList<>();
+                event_queue.put(t, s);
+            }
+
+            s.add(e);
+        }
+        synchronized (clock) {
+            clock.notifyAll();
+        }
+        return e;
+
     }
 
     protected long getDelay() {