About the Veteran Software Architect

// Java: Singleton Pattern Example
public class DatabaseConnection {
    private static DatabaseConnection instance;
    private DatabaseConnection() {
        // private constructor
    }
    public static synchronized DatabaseConnection getInstance() {
        if (instance == null) {
            instance = new DatabaseConnection();
        }
        return instance;
    }
    public void connect() {
        System.out.println("Connected to DB!");
    }
}

// Java: RESTful Controller Example (Spring Boot)
@RestController
@RequestMapping("/api/products")
public class ProductController {
    @Autowired
    private ProductService productService;

    @GetMapping("/{id}")
    public ResponseEntity<Product> getProduct(@PathVariable Long id) {
        Product product = productService.findById(id);
        if(product == null) return ResponseEntity.notFound().build();
        return ResponseEntity.ok(product);
    }

    @PostMapping
    public ResponseEntity<Product> createProduct(@RequestBody Product product) {
        Product created = productService.save(product);
        return ResponseEntity.status(HttpStatus.CREATED).body(created);
    }
}

// Java: Multithreading Example
public class Counter extends Thread {
    private int count = 0;
    public void run() {
        for(int i=0; i<1000; i++) {
            increment();
        }
    }
    public synchronized void increment() {
        count++;
    }
    public int getCount() { return count; }
}

// Java: Lambda and Streams Example
import java.util.*;
public class StreamDemo {
    public static void main(String[] args) {
        List<String> names = Arrays.asList("Joe", "Anna", "Mike", "Sara");
        names.stream()
            .filter(n -> n.startsWith("J"))
            .map(String::toUpperCase)
            .forEach(System.out::println);
    }
}

// Java: Spring Boot Service Layer Example
@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;

    public List<User> getAllUsers() {
        return userRepository.findAll();
    }

    public User saveUser(User user) {
        return userRepository.save(user);
    }
}

// Java: JavaFX Animation Example
import javafx.animation.*;
import javafx.scene.shape.Rectangle;
import javafx.util.Duration;

Rectangle rect = new Rectangle(100, 40);
TranslateTransition tt = new TranslateTransition(Duration.millis(2000), rect);
tt.setByX(300);
tt.setCycleCount(2);
tt.setAutoReverse(true);
tt.play();