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Modern Java: From Fundamentals to Advanced Architecture

Solution: Hidden Server Configuration

Explore the use of private member inner classes in Java to encapsulate server configuration. Understand how the outer class can instantiate and access the inner class's fields directly, demonstrating tight encapsulation and advanced object-oriented programming techniques for secure and maintainable application design.

We'll cover the following...
Java 25
public class Server {
    // 1. Private Inner Class
    private class Config {
        int port = 8080;
    }
    public void start() {
        // 2. Instantiate Inner Class
        Config config = new Config();
        // 3. Access internal details
        System.out.println("Server started on port: " + config.port);
    }
    public static void main(String[] args) {
        Server server = new Server();
        server.start();
    }
}
...