Like fighting with the tiped one of JAVA

The problem is to implement a Observer pattern with two types of “dependents” that do not have anything to do to each other, the only thing that they share is a update() method . I am going to show it graphically, maybe you understand what am I talking about:

Code:

---

|--------------|              |--------------------|      |--------------|
|  Observer1  |              |        Model      |      |  Observer2  |
|--------------|              |--------------------|      |--------------| 
|              |<---------    |dependents:ArrayList|  --->|              |
|--------------|              |--------------------|      |--------------|
|update():void |              |  changed():void  |      |update():void |
|--------------|              |--------------------|      |--------------|

---

Code:

---

public void changed(){
    Iterator it=dependents.iterator();
    while(ir.hasNext()){
        ______  object = (______) it.next();
        object.update();
    }
}

---

any ideas? I want the solution without making 2 differents arrays.

Albert:rolleyes:

The solution that you are looking for is deciphers here:

design-nation.blog/en: An example of the Observer pattern (the java version)

Marcus:cool: