public   class  Main {
   public   static   void  main(String[] args) {
    TestManaget tm =  new  TestManaget();
  }
}

 public   class  TestManaget  extends  Thread {
  MyEventObject event;
  Test FTest;
  MyListener listener;

   public  TestManaget() {
    FTest =  new  Test( this , "1");      //тест 1, ждёт события
    listener =  new  MyListener( this ); //генератор событий
    start();
  }

   public   synchronized   void  setEvent(MyEventObject aEvent) {
    event = aEvent;
  }

   public   synchronized  MyEventObject getEvent() {
     return  event;
  }

   public   synchronized   int  getEventCount() {
     if  (event ==  null )  return   0 ;  else   return   1 ;
  }

   public   synchronized   void  deleteEvent() {
    event =  null ;
  }
  
   public   void  run() {
  }
}


 public   class  MyListener  extends  Thread {
   private  TestManaget Ftm =  null ;
  
   public  IListener(TestManaget aTestManaget) {
    Ftm = aTestManaget;
    start();
  }
  
   public   void  run() {
     while  (true) {
       if  (Ftm.getEventCount() ==  0 ) { //если нет событий, создаю
         long  tmpT = java.lang.System.currentTimeMillis();
        Ftm.event =  new  MyEventObject( new   Long (tmpT).toString(), tmpT);
        System.out.println("MyEventObject created!!!"); //событие создано
         synchronized (Ftm.FTest) {
          System.out.println("Send event: " + Ftm.event.toString() + " to Test1");
          Ftm.FTest.notify(); //оповещаю !!!
        }
      }
       try  {
        sleep( 1000 );
      }  catch (InterruptedException e) {
         throw   new  RuntimeException(e);
      }
    }
  }
}


 public   class  Test  extends  Thread {
  String FName;
  TestManager Ftm =  null ; //parent

   public  Test(TestManager aTM, String aName) {
    FName = aName;
    Ftm = aTM;
    start();
  }
  
   public   void  run() {
     while (true) {
      MyEventObject tmpEvent = Ftm.getEvent(); //есть ли событие?
       while (tmpEvent ==  null ) { //нет события - жду его появления
         synchronized (Ftm.FTest) { //!!!
           try  {
            wait();  //wait и notify по одному и тому же объекту
          }  catch (InterruptedException e) {
             throw   new  RuntimeException(e);
          }
        }
      }
      System.out.println("Test #" + FName + " got event: " + tmpEvent.toString());
      Ftm.deleteEvent(FName, tmpEvent.Name);
      tmpEvent =  null ;
    }
  }
}

 public   class  MyEventObject {
   public  String Name = "";
   public   long  Number;
  
   public  MyEventObject(String aName,  long  aNumber) {
    Name = aName;
    Number = aNumber;
  }
  
   public  String toString() {
     return  Name;
  }
}