똑같이 따라 쳤는데 null이 뜹니다..

안녕하세요 강의 잘보고 있습니다!! 

코드를 따라치다가 계속해서 setUrl의 값을 받지 못하고, null값만 뱉어 냅니다.. 아무리 찾아봐도 모르겠어서 질문 남깁니다.. 어는 부분에서 문제가 생긴건가요...? 감사합니다!

package hello.core.lifecycle;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;

public class NetworkClient implements InitializingBean, DisposableBean {

    private String url;

    public NetworkClient() {
        System.out.println("생성자호출, url = " + url);
    }

    public void setUrl(String Url) {
        this.url = url;
    }

    //서비스 시작시 호출
    public void connect() {
        System.out.println("connect: " + url);
    }

    public void call(String message){
        System.out.println("call: " + url + " message =" + message);

    }

    //서비스 종료시 호출
    public void disConnect() {
        System.out.println("close " + url);

    }

    //의존관계 주입이 끝나면 호출 됨
    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("NetworkClient.afterPropertiesSet");
        connect();
        call("초기화 연결 메시지");

    }

    @Override
    public void destroy() throws Exception {
        System.out.println("NetworkClient.destory");
        disConnect();
    }
}

package hello.core.lifecycle;


import org.junit.jupiter.api.Test;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

public class BeanLifeCycleTest {

    @Test
    public void lifeCycleTest() {
        ConfigurableApplicationContext ac = new AnnotationConfigApplicationContext(LifeCycleConfig.class);
        NetworkClient client = ac.getBean(NetworkClient.class);
        ac.close();
    }

    @Configuration
    static class LifeCycleConfig {

        @Bean
        public NetworkClient networkClient() {
            NetworkClient networkClient = new NetworkClient();
            networkClient.setUrl("http://hello-spring.dev");
            return networkClient;
        }
    }
}

/Library/Java/JavaVirtualMachines/jdk-11.0.13.jdk/Contents/Home/bin/java -ea -Didea.test.cyclic.buffer.size=1048576 -javaagent:/Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar=58427:/Applications/IntelliJ IDEA CE.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Users/changhyeon/.m2/repository/org/junit/platform/junit-platform-launcher/1.8.2/junit-platform-launcher-1.8.2.jar:/Users/changhyeon/.m2/repository/org/junit/platform/junit-platform-engine/1.8.2/junit-platform-engine-1.8.2.jar:/Users/changhyeon/.m2/repository/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar:/Users/changhyeon/.m2/repository/org/junit/platform/junit-platform-commons/1.8.2/junit-platform-commons-1.8.2.jar:/Users/changhyeon/.m2/repository/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar:/Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar:/Applications/IntelliJ IDEA CE.app/Contents/plugins/junit/lib/junit5-rt.jar:/Applications/IntelliJ IDEA CE.app/Contents/plugins/junit/lib/junit-rt.jar:/Users/changhyeon/Desktop/이창현/coding/study/infren/core/out/test/classes:/Users/changhyeon/Desktop/이창현/coding/study/infren/core/out/production/classes:/Users/changhyeon/Desktop/이창현/coding/study/infren/core/out/production/resources:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-test/2.6.4/4befb5f23c4bac74125d1c9e4f3721586b315d3a/spring-boot-starter-test-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter/2.6.4/31adf5f726b6a5703815b99056110b96db7eff58/spring-boot-starter-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.projectlombok/lombok/1.18.22/9c08ea24c6eb714e2d6170e8122c069a0ba9aacf/lombok-1.18.22.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-test-autoconfigure/2.6.4/fe1ab93aa3ca84e50d0f470a17468a8e7e2770e3/spring-boot-test-autoconfigure-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-test/2.6.4/f7669dafbe66e2805349049c090d9cbca974fbd5/spring-boot-test-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework/spring-test/5.3.16/eba2a6612c3bb86cc71b31c731cb46164309f796/spring-test-5.3.16.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework/spring-core/5.3.16/db1b277cd548c725144580dda8703ce179fb3769/spring-core-5.3.16.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/com.jayway.jsonpath/json-path/2.6.0/67f565b424f7903a12d4f5b9361b11462ecacdac/json-path-2.6.0.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/jakarta.xml.bind/jakarta.xml.bind-api/2.3.3/48e3b9cfc10752fba3521d6511f4165bea951801/jakarta.xml.bind-api-2.3.3.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.assertj/assertj-core/3.21.0/27a14d6d22c4e3d58f799fb2a5ca8eaf53e6942a/assertj-core-3.21.0.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.hamcrest/hamcrest/2.2/1820c0968dba3a11a1b30669bb1f01978a91dedc/hamcrest-2.2.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.junit.jupiter/junit-jupiter/5.8.2/5a817b1e63f1217e5c586090c45e681281f097ad/junit-jupiter-5.8.2.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.mockito/mockito-junit-jupiter/4.0.0/b76de25bd6e5d8f7924d0536729c0076e37e9396/mockito-junit-jupiter-4.0.0.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.mockito/mockito-core/4.0.0/f5195e0c4a45716bbd2d1d29173adbd148acce3a/mockito-core-4.0.0.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.skyscreamer/jsonassert/1.5.0/6c9d5fe2f59da598d9aefc1cfc6528ff3cf32df3/jsonassert-1.5.0.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.xmlunit/xmlunit-core/2.8.4/35be57989ca80eefa03161b211630e319a8f36c6/xmlunit-core-2.8.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-autoconfigure/2.6.4/36e75a2781fc604ac042945eed8be2fe049731df/spring-boot-autoconfigure-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot/2.6.4/356c0ee25794ca46d8344d13cffbc30bfae1dc0e/spring-boot-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-logging/2.6.4/e8bab752fd29797df304ef2ad8575e5392d96c4c/spring-boot-starter-logging-2.6.4.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/jakarta.annotation/jakarta.annotation-api/1.3.5/59eb84ee0d616332ff44aba065f3888cf002cd2d/jakarta.annotation-api-1.3.5.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.29/6d0cdafb2010f1297e574656551d7145240f6e25/snakeyaml-1.29.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.springframework/spring-jcl/5.3.16/18d422952e0ce534c2b0ac8b47176c2432fb7e78/spring-jcl-5.3.16.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/net.minidev/json-smart/2.4.8/7c62f5f72ab05eb54d40e2abf0360a2fe9ea477f/json-smart-2.4.8.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.slf4j/slf4j-api/1.7.36/6c62681a2f655b49963a5983b8b0950a6120ae14/slf4j-api-1.7.36.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/jakarta.activation/jakarta.activation-api/1.2.2/99f53adba383cb1bf7c3862844488574b559621f/jakarta.activation-api-1.2.2.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.junit.jupiter/junit-jupiter-params/5.8.2/ddeafe92fc263f895bfb73ffeca7fd56e23c2cce/junit-jupiter-params-5.8.2.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/org.junit.jupiter/junit-jupiter-api/5.8.2/4c21029217adf07e4c0d0c5e192b6bf610c94bdc/junit-jupiter-api-5.8.2.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/net.bytebuddy/byte-buddy/1.11.22/8b4c7fa5562a09da1c2a9ab0873cb51f5034d83f/byte-buddy-1.11.22.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/net.bytebuddy/byte-buddy-agent/1.11.22/2fbcf3210dfc09b42242e3b66a5281cc5b9adb80/byte-buddy-agent-1.11.22.jar:/Users/changhyeon/.gradle/caches/modules-2/files-2.1/com.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com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit5 hello.core.lifecycle.BeanLifeCycleTest,lifeCycleTest
15:53:33.453 [main] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@6253c26
15:53:33.472 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
15:53:33.615 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
15:53:33.620 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
15:53:33.624 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
15:53:33.626 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
15:53:33.634 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'beanLifeCycleTest.LifeCycleConfig'
15:53:33.641 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'networkClient'
생성자호출, url = null
NetworkClient.afterPropertiesSet
connect: null
call: null message =초기화 연결 메시지
15:53:33.756 [main] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@6253c26, started on Thu Apr 07 15:53:33 KST 2022
NetworkClient.destory
close null

Process finished with exit code 0

public void setUrl(String Url) {
        this.url = url;
    }