Question

I have an object that I want to be modified when I call the appropriate instance method for it. (I think that is the correct vocabulary)

From one class, I am doing this:

 Pizza pizza = new Pizza();
 pizza.addTopping(Cheese);
 pizza.addTopping(Pepperoni);
 pizza.setCrustType("thick");
 pizza.make();
 pizza.putInOven();

Here’s where things get interesting. So here’s the make() method that is called above that is in the class Pizza.

 public void make()
 {  
      final Pizza pizza = this;
      pizza.registerUpdateHandler(new IUpdateHandler()
      {             
           @Override
           public void onUpdate(float cookTime)
           {
                // need to do some modifications to pizza
                pizza.doSomething();
                pizza.doSomethingElse();
           }
      });
 }

In order to be able to access the pizza object inside the inner class, IUpdateHandler(), I have to set a Pizza object to this. But then, it also has to be final because you:

Cannot refer to a non-final variable inside an inner class defined in a different method.

Going back to my original code snippet, I still need to call pizza.putInOven() and have it be referencing the same Pizza object as all the other calls, but with the modifications from the make() method in effect. Because I had to create a new Pizza object of type final in the method make() that is no longer the same object modified when I want to call putInOven().

How do I solve this issue? If my question is not clear, I’ll do my best to edit and restate, just leave a comment.

Answer 1

you don’t need the additional pizza variable because the code is already executed inside the pizza object.

public void make(){  
      registerUpdateHandler(new IUpdateHandler(){             
           @Override
           public void onUpdate(float cookTime){
                // need to do some modifications to pizza
                doSomething();
                doSomethingElse();
           }
      });
 }