Java Community | Help. Code. Learn.•11mo ago

Mediator Pattern Code How does this code actually built because it's not actually straight forward

So I am following this code example for mediator pattern https://refactoring.guru/design-patterns/mediator/java/example

Mediator pattern in Java. Full code example in Java with detailed comments and explanation. Mediator is a behavioral design pattern that reduces coupling between components of a program by making them communicate indirectly, through a special mediator object.

20 Replies

JavaBot•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

So my question is it's not like you can define the Mediator interface from the start First you just declare the interface? but if you see the code example order for each class It starts with Component but the component has already Mediator defined now if you go to the AddButton class which is next, you can see

    @Override
    protected void fireActionPerformed(ActionEvent actionEvent) {
        mediator.addNewNote(new Note());
    }

    @Override
    protected void fireActionPerformed(ActionEvent actionEvent) {
        mediator.addNewNote(new Note());
    }

mediator.addNewNote is called but this is just the second class yet I haven't declared a addNewNote in the Mediator interface and also that method addNewNote which takes a Note class which I haven't even created So I am confused about how it actually gets built

Unknown User•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

oh ok that make sense

Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

https://www.digitalocean.com/community/tutorials/mediator-design-pattern-java

Mediator Design Pattern in Java | DigitalOcean

Technical tutorials, Q&A, events — This is an inclusive place where developers can find or lend support and discover new ways to contribute to the community.

Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

so what are the problems we will be facing if you didn't use the Pattern here? what problem it solves?

JavaBot•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

no please don't delette

Unknown User•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

Ok yah I found the page later So instead of coupling components you have a mediator

Unknown User•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

I tried to mimic what would be the problem if I didn't use the Mediator pattern

Unknown User•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

yah I failed but I later understood the entire Component, Mediator, Collegues thing Currently I have a sample exam question to solve I am going to work on this

Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

Unknown User•11mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

hi @Fischstaebchen I created one but it's kinda big

Rag...JN 🌌 🦡 👽 💰 🐊OP•11mo ago

https://github.com/ragujan/design_pattern_practicals/tree/main/src/main/java/com/rag/practicals/mediator_pattern/test5

GitHub

design_pattern_practicals/src/main/java/com/rag/practicals/mediator...

Java Design Pattern Practicals. Contribute to ragujan/design_pattern_practicals development by creating an account on GitHub.

Unknown User•11mo ago

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JavaBot•11mo ago

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Mediator Pattern Code How does this code actually built because it's not actually straight forward