Accessing Object methods

[binary_matter]

Hello all,

I have three classes

class A , B , C

Class A is a JFrame with data

Class B is a JPanel with data

Class C is a JFrame with data

Class C is opened from Class B

When something changes in class C it should change some data in Class A

What im doing at the moment is passing ClassA to B then to C in the constructor

Is there a better way to do this ?
Can there be a interface or something?

When a program keeps on growing the object passing becomes quite difficult to handle
and i would like to stay away from any static methods

Thank you all

[Zyril]

Can there be a interface or something?

Hi, and yes, there is a nice design pattern that makes use of an interface and that does the exact thing that you are looking for. It's called the Observer-pattern, or sometimes referred to as Publisher/Subscriber-pattern.

The observer pattern defines a one-to-many dependency between objects so that when one object changes state, all of its dependents are notified and updated automatically.

Take a look here: Observer Design Pattern in Java

Also, this Youtube video might be helpful to understanding this more easily. It might seem low quality but I think he explains it nicely:
The Observer Design Pattern - YouTube


Any questions, feel free to ask!

[binary_matter]

Hi, and yes, there is a nice design pattern that makes use of an interface and that does the exact thing that you are looking for. It's called the Observer-pattern, or sometimes referred to as Publisher/Subscriber-pattern.



Take a look here: Observer Design Pattern in Java

Also, this Youtube video might be helpful to understanding this more easily. It might seem low quality but I think he explains it nicely:
The Observer Design Pattern - YouTube


Any questions, feel free to ask!

Thank you for the answer , i will look into it and let you know :)