Spring Framework FAQ: Top Questions

@Lazy is used to delay the initialization of a bean until it is needed, rather than at application startup. It can be applied at the bean definition or injection point level.

📘 Behavior:

• @Lazy(true): Bean is created only when requested.
• Can improve startup time by deferring heavy bean initialization.

📥 Example:

@Lazy
@Component
public class HeavyComponent {
  public HeavyComponent() {
    System.out.println("HeavyComponent initialized.");
  }
}

🏆 Expected Output:

"HeavyComponent initialized." is printed only when bean is accessed.

🛠️ Use Cases:

• Performance optimization in large applications.
• Optional services or conditional beans.