2924. Design Pattern - Mediator
Mediator Pattern

Behavioral Pattern: Mediator Pattern.

1. Mediator

The Mediator pattern is used to provide a centralized communication medium between different objects in a system.

2. Example

2.1 User

public class User { private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } public User(String name){ this.name = name; } public void sendMessage(String message){ ChatRoom.showMessage(this,message); } }

2.2 ChatRoom

public class ChatRoom { public static void showMessage(User user, String message){ System.out.println(new Date().toString() + " [" + user.getName() + "] : " + message); } }

2.3 Client

public class Client { public void run() { User robert = new User("Robert"); User john = new User("John"); robert.sendMessage("Hi! John!"); john.sendMessage("Hello! Robert!"); } }

Output.

Fri Nov 30 16:08:46 PST 2018 [Robert] : Hi! John! Fri Nov 30 16:08:46 PST 2018 [John] : Hello! Robert!

3. Source Files

4. References