[Spring🌱] Bean 지연 초기화,즉시 초기화

package com.example.lazyinitialization;

import org.springframework.context.annotation.*;

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

@Component
@Lazy
class ClassB {
    private final ClassA classA;

    public ClassB(ClassA classA) {
        System.out.println("ClassB initialized");
        this.classA = classA;
    }

    public void doSomething() {
        System.out.println("Doing something...");
    }
}

@Configuration
@ComponentScan
public class LazyInitializationExample {

    public static void main(String[] args) {
        var context = new AnnotationConfigApplicationContext(LazyInitializationExample.class);
        System.out.println("Context initialized");

        context.getBean(ClassB.class).doSomething();
    }
}

ClassA initialized
Context initialized
ClassB initialized
Doing something...