학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오) 예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 예3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)예 [질문 내용]여기에 질문 내용을 남겨주세요. java 11버전을 사용하고 있고 pom.xml 파일과 persistence.xml은 강의내용을 복붙했습니다.버전 문제인 것 같은데 해결 방법이 있을까요?

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/[질문 내용]수업을 시작하기 이전에 선생님께서 제작하신 책도 나와있던데, 강좌 소개를 보면 본 강의를 메인으로 하고 책은 참고로 하면 좋다, 깊게 들어가지 않는다면 필요는 없다라고 들었었습니다. 사실 신입인 터라 jpa를 들어서 바로sql을 쓸지 잘 모르고, 그저 어떻게보면 제 목적은 jpa를 배우면서 좀 더 sql을 잘하고 싶다는 마음으로 등록한건데 이해력도 조금 부족해서 뭔가 보조하는 게 없으면 쉽지않습니다 ㅎㅎ;;; 그래서 강의를 들으면서 이책과 함께 또 공부를 하면 이해하기 더 편한지 그 부분이 궁금합니다. 물론 제가 연차가 쌓이고 나면 늦든 빠르든 구매는 해볼 생각입니다

[질문 내용]스프링 로드맵에서는 core의 Assertions를 사용했는데 여기에서는 jupiter의 Assertions를 사용해서 궁금한 점이 생겼습니다. 둘은 어떤 차이이며, 현재는 어떤것을 더 선호하는지 궁금합니다.현재 저는 스프링 로드맵에서 했던것 처럼 core의 Assertions를 사용해 하고 있는데 정상테스트와 오류테스트를 모두 core로 할 수 있다면 core로 하는게 더 좋을까요?

[질문 템플릿]2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예[질문 내용]저 혼자 개발할 때는 localhost:8080 과 postman에서 API를 사용해 본다는 것까지 이해했습니다.만약 안드로이드 개발자와 협업을 합니다.그러면 그 사람도 개발 과정에서 api를 호출해서 받아올텐데 제가 만든 api를 어떻게 가져오나요??대부분 개발 과정에서 어떻게 하나요?

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]여기에 질문 내용을 남겨주세요. 회원 수정 API를 구현중 select 쿼리가 왜 안나가는지 궁금해서 질문드립니다.localhost:8080/api/v2/members/1 을 호출했을때 쿼리가 언제 나오는지 분석해 봤습니다.update 메서드 실행 -> select 쿼리가 나감update 메서드 종료직전 -> update 쿼리 나감updateMemberV2 돌아와서 memberService.findOne()할때는 왜 select가 나가지 않을까요? 1========2023-06-22T12:24:25.330+09:00 DEBUG 55687 --- [nio-8080-exec-9] org.hibernate.SQL : select m1_0.member_id, m1_0.city, m1_0.street, m1_0.zipcode, m1_0.username from member m1_0 where m1_0.member_id=?2023-06-22T12:24:25.331+09:00 INFO 55687 --- [nio-8080-exec-9] p6spy : #1687404265331 | took 0ms | statement | connection 6| url jdbc:h2:tcp://localhost/~/jpashop2select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.username from member m1_0 where m1_0.member_id=?select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.username from member m1_0 where m1_0.member_id=1;2========2023-06-22T12:24:25.355+09:00 DEBUG 55687 --- [nio-8080-exec-9] org.hibernate.SQL : update member set city=?, street=?, zipcode=?, username=? where member_id=?2023-06-22T12:24:25.356+09:00 INFO 55687 --- [nio-8080-exec-9] p6spy : #1687404265356 | took 0ms | statement | connection 6| url jdbc:h2:tcp://localhost/~/jpashop2update member set city=?,street=?,zipcode=?,username=? where member_id=?update member set city=NULL,street=NULL,zipcode=NULL,username='dd-hello' where member_id=1;2023-06-22T12:24:25.358+09:00 INFO 55687 --- [nio-8080-exec-9] p6spy : #1687404265358 | took 0ms | commit | connection 6| url jdbc:h2:tcp://localhost/~/jpashop2;3========2023-06-22T12:24:25.363+09:00 INFO 55687 --- [nio-8080-exec-9] p6spy : #1687404265363 | took 0ms | commit | connection 6| url jdbc:h2:tcp://localhost/~/jpashop2;4======== 

[질문 템플릿]1. 강의 내용과 관련된 질문인가요? 예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? 예3. 질문 잘하기 메뉴얼을 읽어보셨나요? 예[질문 내용]Hello 클래스 객체에서 인스턴스 name이 결과로 나오는 JSON형식의 key값이 아니라, getter/setter의 getter의 영향만 받는것 같습니다. 제가 이해한게 맞나요? 왜 이런식으로 동작하나요?예를 들어 pricate String name1; public String getName2(){ return name1; } public void setName3(){ return name1; } 위 처럼 코드를 짜면 {"name1":"value"}가 나오는게 아니라{"name2":"value"}로 나오는데 왜 이런건지 궁금합니다...

[질문 템플릿]1. 강의 내용과 관련된 질문인가요? 예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? 예3. 질문 잘하기 메뉴얼을 읽어보셨나요? 예[질문 내용]정적 컨텐츠 이미지 설명하실 때 목록 관련 컨트롤러가 존재하지 않을 경우 정적 페이지를 로드한다고 설명하신 것 같은데(제가 이해한게 맞나요?), hello-static.html 컨트롤러를 따로 만들고 테스트해본 결과 같은 이름으로 되어있으면 정적페이지가 우선적으로 로딩되는데 제가 뭔가 잘못이해한건가요?

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용] 강의 후반부에 엔티티로 바꾸고 업데이트 치는 부분은 넘어가셨는데 업데이트 하는 방법이 알고싶어서 질문 드립니다.   List<AddressEntity> addressHistory = member1.getAddressHistory(); for (AddressEntity addressEntity : addressHistory) { if(addressEntity.getId()==2){ addressEntity.setAddress(new Address("up","up","up")); } } em.persist(member1); 특정 키를 가진 ADRESS를 업데이트 하려고 하면 위의 방식으로 하는게 맞는건가요? 뭔가 다른방법이 있는지 궁금합니다..

안녕하세요. MemberRepository 에서 @Query("select new study.datajpa.dto.MemberDto(m.id, m.username, t.name from Member m join m.team t") List<MemberDto> findMemberDto();메소드를 만들고test케이스 실행시 에러가 납니다.// @Query DTO 조회하기 @Test public void findMemberDto() throws Exception { Team team = new Team("teamA"); teamRepository.save(team); Member m1 = new Member("aaa", 10); m1.setTeam(team); memberRepository.save(m1); //given List<MemberDto> memberDto = memberRepository.findMemberDto(); for (MemberDto dto : memberDto) { System.out.println("MemberDto = " + dto); } }MemberDtopackage study.datajpa.dto; import lombok.Data; @Data public class MemberDto { private Long id; private String username; private String teamName; public MemberDto(Long id, String username, String teamName) { this.id = id; this.username = username; this.teamName = teamName; } }  에러내용Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2023-06-21 23:06:10.483 ERROR 15020 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'memberRepository' defined in study.datajpa.repository.MemberRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int); Reason: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)!; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)! at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:936) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:920) ~[spring-context-5.3.27.jar:5.3.27] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.27.jar:5.3.27] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.12.jar:2.7.12] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.12.jar:2.7.12] at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.12.jar:2.7.12] at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:136) ~[spring-boot-test-2.7.12.jar:2.7.12] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:141) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:90) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:124) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:248) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:138) ~[spring-test-5.3.27.jar:5.3.27] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$8(ClassBasedTestDescriptor.java:363) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:368) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$9(ClassBasedTestDescriptor.java:363) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:310) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734) ~[na:na] at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:362) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$instantiateAndPostProcessTestInstance$6(ClassBasedTestDescriptor.java:283) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:282) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4(ClassBasedTestDescriptor.java:272) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at java.base/java.util.Optional.orElseGet(Optional.java:364) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5(ClassBasedTestDescriptor.java:271) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:31) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:102) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:101) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:66) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$2(NodeTestTask.java:123) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:123) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:90) ~[junit-platform-engine-1.8.2.jar:1.8.2] at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na] at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.8.2.jar:1.8.2] at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na] at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:57) ~[junit5-rt.jar:na] at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38) ~[junit-rt.jar:na] at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11) ~[idea_rt.jar:na] at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35) ~[junit-rt.jar:na] at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235) ~[junit-rt.jar:na] at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54) ~[junit-rt.jar:na] Caused by: org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int); Reason: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)!; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)! at org.springframework.data.repository.query.QueryCreationException.create(QueryCreationException.java:101) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:107) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$mapMethodsToQuery$1(QueryExecutorMethodInterceptor.java:95) ~[spring-data-commons-2.7.12.jar:2.7.12] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) ~[na:na] at java.base/java.util.Collections$UnmodifiableCollection$1.forEachRemaining(Collections.java:1061) ~[na:na] at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.mapMethodsToQuery(QueryExecutorMethodInterceptor.java:97) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$new$0(QueryExecutorMethodInterceptor.java:87) ~[spring-data-commons-2.7.12.jar:2.7.12] at java.base/java.util.Optional.map(Optional.java:260) ~[na:na] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.<init>(QueryExecutorMethodInterceptor.java:87) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:365) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:323) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.util.Lazy.getNullable(Lazy.java:231) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.util.Lazy.get(Lazy.java:115) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:329) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.27.jar:5.3.27] ... 86 common frames omitted Caused by: java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)! at org.springframework.data.jpa.repository.query.SimpleJpaQuery.validateQuery(SimpleJpaQuery.java:96) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.SimpleJpaQuery.<init>(SimpleJpaQuery.java:66) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryFactory.fromMethodWithQueryString(JpaQueryFactory.java:51) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:169) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:253) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:93) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:103) ~[spring-data-commons-2.7.12.jar:2.7.12] ... 108 common frames omitted Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: m is not mapped [select m from m where m.username = :username and m.age = :age] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:138) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:757) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:114) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:362) ~[spring-orm-5.3.27.jar:5.3.27] at jdk.proxy2/jdk.proxy2.$Proxy109.createQuery(Unknown Source) ~[na:na] at org.springframework.data.jpa.repository.query.SimpleJpaQuery.validateQuery(SimpleJpaQuery.java:90) ~[spring-data-jpa-2.7.12.jar:2.7.12] ... 114 common frames omitted Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: m is not mapped [select m from m where m.username = :username and m.age = :age] at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:220) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:144) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:112) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:73) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:162) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:636) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:748) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] ... 122 common frames omitted Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: m is not mapped at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:170) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:91) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:77) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:334) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3782) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3671) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:746) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:602) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:339) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:287) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:276) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:192) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] ... 128 common frames omitted 2023-06-21 23:06:10.487 ERROR 15020 --- [ main] o.s.test.context.TestContextManager : Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@6e01f9b0] to prepare test instance [study.datajpa.repository.MemberRepositoryTest@44ec4a38] java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:98) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:124) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:248) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:138) ~[spring-test-5.3.27.jar:5.3.27] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$8(ClassBasedTestDescriptor.java:363) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:368) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$9(ClassBasedTestDescriptor.java:363) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:310) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734) ~[na:na] at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:362) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$instantiateAndPostProcessTestInstance$6(ClassBasedTestDescriptor.java:283) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:282) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4(ClassBasedTestDescriptor.java:272) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at java.base/java.util.Optional.orElseGet(Optional.java:364) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5(ClassBasedTestDescriptor.java:271) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:31) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:102) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:101) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:66) ~[junit-jupiter-engine-5.8.2.jar:5.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$2(NodeTestTask.java:123) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:123) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:90) ~[junit-platform-engine-1.8.2.jar:1.8.2] at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na] at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.8.2.jar:1.8.2] at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na] at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54) ~[junit-platform-engine-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53) ~[junit-platform-launcher-1.8.2.jar:1.8.2] at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:57) ~[junit5-rt.jar:na] at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38) ~[junit-rt.jar:na] at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11) ~[idea_rt.jar:na] at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35) ~[junit-rt.jar:na] at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235) ~[junit-rt.jar:na] at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54) ~[junit-rt.jar:na] Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'memberRepository' defined in study.datajpa.repository.MemberRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int); Reason: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)!; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)! at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:936) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:920) ~[spring-context-5.3.27.jar:5.3.27] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.27.jar:5.3.27] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.12.jar:2.7.12] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.12.jar:2.7.12] at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.12.jar:2.7.12] at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:136) ~[spring-boot-test-2.7.12.jar:2.7.12] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:141) ~[spring-test-5.3.27.jar:5.3.27] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:90) ~[spring-test-5.3.27.jar:5.3.27] ... 71 common frames omitted Caused by: org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int); Reason: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)!; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)! at org.springframework.data.repository.query.QueryCreationException.create(QueryCreationException.java:101) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:107) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$mapMethodsToQuery$1(QueryExecutorMethodInterceptor.java:95) ~[spring-data-commons-2.7.12.jar:2.7.12] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) ~[na:na] at java.base/java.util.Collections$UnmodifiableCollection$1.forEachRemaining(Collections.java:1061) ~[na:na] at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.mapMethodsToQuery(QueryExecutorMethodInterceptor.java:97) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$new$0(QueryExecutorMethodInterceptor.java:87) ~[spring-data-commons-2.7.12.jar:2.7.12] at java.base/java.util.Optional.map(Optional.java:260) ~[na:na] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.<init>(QueryExecutorMethodInterceptor.java:87) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:365) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:323) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.util.Lazy.getNullable(Lazy.java:231) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.util.Lazy.get(Lazy.java:115) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:329) ~[spring-data-commons-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.27.jar:5.3.27] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.27.jar:5.3.27] ... 86 common frames omitted Caused by: java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List study.datajpa.repository.MemberRepository.findUser(java.lang.String,int)! at org.springframework.data.jpa.repository.query.SimpleJpaQuery.validateQuery(SimpleJpaQuery.java:96) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.SimpleJpaQuery.<init>(SimpleJpaQuery.java:66) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryFactory.fromMethodWithQueryString(JpaQueryFactory.java:51) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:169) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:253) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:93) ~[spring-data-jpa-2.7.12.jar:2.7.12] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:103) ~[spring-data-commons-2.7.12.jar:2.7.12] ... 108 common frames omitted Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: m is not mapped [select m from m where m.username = :username and m.age = :age] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:138) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:757) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:114) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:362) ~[spring-orm-5.3.27.jar:5.3.27] at jdk.proxy2/jdk.proxy2.$Proxy109.createQuery(Unknown Source) ~[na:na] at org.springframework.data.jpa.repository.query.SimpleJpaQuery.validateQuery(SimpleJpaQuery.java:90) ~[spring-data-jpa-2.7.12.jar:2.7.12] ... 114 common frames omitted Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: m is not mapped [select m from m where m.username = :username and m.age = :age] at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:220) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:144) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:112) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:73) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:162) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:636) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:748) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] ... 122 common frames omitted Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: m is not mapped at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:170) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:91) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:77) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:334) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3782) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3671) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:746) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:602) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:339) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:287) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:276) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:192) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final] ... 128 common frames omitted 어디서 문제가 발생된걸까요?

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); Main main = new Main(); for (int i = 0; i < n; i++) { System.out.print(main.solution(i) + " "); } } private int solution(int i) { if (i <= 1) { return 1; } return solution(i - 1) + solution(i - 2); } }

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]안녕하세요.카운트 쿼리 분리 부분을 듣는 도중에 카운트 쿼리에 LEFT JOIN이 사용되는 결과를 확인하기 위해 다음처럼 코드를 작성하였습니다.public interface MemberRepository extends JpaRepository<Member, Long> { @Query(value = "select m from Member m left join m.team t") Page<Member> findByAge(int age, Pageable pageable); ... } @Test public void paging() throws Exception { //given memberRepository.save(new Member("member1", 10)); memberRepository.save(new Member("member2", 10)); memberRepository.save(new Member("member3", 10)); memberRepository.save(new Member("member4", 10)); memberRepository.save(new Member("member5", 10)); //when PageRequest pageRequest = PageRequest.of(0, 3, Sort.by(Sort.Direction.ASC, "username")); Page<Member> page = memberRepository.findByAge(10, pageRequest); //then List<Member> content = page.getContent(); assertThat(content.size()).isEqualTo(3); assertThat(page.getTotalElements()).isEqualTo(5); assertThat(page.getNumber()).isEqualTo(0); assertThat(page.getTotalPages()).isEqualTo(2); assertThat(page.isFirst()).isTrue(); assertThat(page.hasNext()).isTrue(); }그런데 결과는 강의와는 달리 카운트 쿼리에 LEFT JOIN 이 사용되지 않았고, 심지어 JPQL select m from Member m left join m.team t 을 @Query에 작성했음에도 조회 쿼리도 LEFT JOIN을 사용하지 않은 것을 확인했습니다.이후 스프링 부트 3 이하 버전에서 동일한 코드로 실행해보니 강의와 동일한 결과를 얻을 수 있었습니다.스프링 부트 3 부터 적용된 스프링 데이터 JPA 에서는 이러한 부분의 최적화를 자동으로 제공하는 것일까요?

public void buy(String ticketName) throws InterruptedException { RLock lock = redissonClient.getLock(ticketName); try { boolean available = lock.tryLock(5, 1, TimeUnit.SECONDS); if (!available) { return; } ticketServiceWithRedisRedissonClientLock.buy(ticketName); } finally { if (lock.isLocked() && lock.isHeldByCurrentThread()) { lock.unlock(); } } }이 구조에서 tryLock에 대해서 5초동안 Lock 획득을 위해서 대기하고 Lock을 1초동안 점유하고 release하는 형식으로 알고있는데 만약에 쓰레드가 5초 동안 대기를 하더라도 최종적으로 Lock을 얻지 못한다면 return이 됨으로써 buy로직으로 못들어가는거 아닌가요?? 만약에 반드시 Lock을 얻고 buy로 들어가야만 하는 경우 Lock 재획득에 대한 로직을 따로 구현해야 하는건가요. 아니면 tryLock의 재시도에 대해서 제가 모르는 부분이 있는건가요?? public void buy(String ticketName) throws InterruptedException { final RLock lock = redissonClient.getLock(ticketName); final int maxRetryCount = 10; final int retryIntervalMillis = 1000; try { int retryCount = 0; boolean lockAcquired = lock.tryLock(5, 1, TimeUnit.SECONDS); while (!lockAcquired && retryCount < maxRetryCount) { log.info( "--> Thread [{}] Redis Distributed Lock (Redisson Client) 획득 대기", Thread.currentThread().getName() ); Thread.sleep(retryIntervalMillis); lockAcquired = lock.tryLock(5, 1, TimeUnit.SECONDS); retryCount++; } if (!lockAcquired) { log.info( "--> Thread [{}] Redis Distributed Lock (Redisson Client) 획득 실패", Thread.currentThread().getName() ); return; } ticketServiceWithRedisRedissonClientLock.buy(ticketName); } finally { if (lock.isLocked() && lock.isHeldByCurrentThread()) { lock.unlock(); } } }이런 방식으로 최대 재시도 횟수와 재시도 간 간격을 통해서 waitTime동안 Lock을 못얻을 경우 Lock자체를 다시 얻는 방식을 구현해보았고 waitTime=1, unit=ms로 변경하고 테스트했을 경우 정상적으로 retry가 됨을 확인했습니다. 이런 구조가 최선일까요??아니면 더 나은 방식이 있을까요? 

import java.util.*; class Main { public String solution(String need, String plan){ String answer = "YES"; Queue<Character> q = new LinkedList<>(); for(char x: need.toCharArray()){ q.offer(x); // 필수과목을 q에 넣어줌 } for(int i = 0; i<plan.length(); i++){ if(!q.isEmpty() && q.peek() == plan.charAt(i)){ //교육과정 첫 번째 과목 == 현수의과목 q.poll(); } } if(!q.isEmpty()){ answer ="NO"; } return answer; } public static void main(String[] args){ Main T = new Main(); Scanner kb = new Scanner(System.in); String a=kb.next(); String b=kb.next(); System.out.println(T.solution(a, b)); } }안녕하세요! 항상 양질의 강의 잘 듣고 있습니다!처음에 if(!q.isEmpty() && q.peek() == plan.charAt(i)) 부분에서 if(q.peek() == plan.charAt(i)) 로 조건문을 짰는데, 런타임 에러가 나서 !q.isEmpty() 를 붙였더니 정상적으로 잘 돌아가게 되었습니다. 웹서핑을 하다보니 큐에 자료가 없을 경우 q.peek()를 할 경우 exception이 나 런타임 에러가 난다고 하는 데 맞을까요?

[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예)[질문 내용]제가 3주 정도의 기간 안에 스프링부트의 틀을 빠르게 공부를 해야됩니다. 김영한 강사님의 강의를 들으려고 하는데 아래의 순서로 진행을 해도 될까요?스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술김영한의 스프링부트와 jpa 실무 완전 정복 로드맵 (야생형)

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]아랫분의 질의응답을 참고하여 하려고 했지만 코끼리 아이콘을 누르면 재빌딩을 할 뿐 setup 관련 아이콘은 뜨지 않습니다.

안녕하세요. 백엔드 개발자 희망하고 있습니다. 자바 독학 공부 시작했는데 기본문법 예제들은 혼자 짤 수 있는데 객체지향/3 로또 부분부터 어렵네요. 구구단, 별찍기 하다가 로또 구현할 수 있을때까지 공부 방법이 궁금합니다. ㅠ.ㅠ 자바 공부 방법 알려주세요 ㅠㅠㅠ 지금은 강사님 강의 보고 이해가 부족하다는 부분 이론서 보면서 나가고있습니다. 이론서에 나와있는 문제들도 타이핑 하면서 진행하구 있습니다.길게 코드 작성할 수 있을때까지 자바 공부 방법 알려주세요.

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]여기에 질문 내용을 남겨주세요.html 관련 코드 복붙하고 실행하면 이렇게 뜨는데 왜 이런건가요??

코드를 아래 첨부파일과 같이 작성하고 실행을 시켜보니  위 처럼 DB 연동과정에서Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set오류가 뜹니다. 구글링을 통해 yml 코드를 아래와 같이 jpa값을 넣어서 수정하고 실행하면 spring:datasource:url: "jdbc:mysql://localhost/library" username: "root"password: ""driver-class-name: com.mysql.cj.jdbc.Driverjpa:database-platform: org.hibernate.dialect.MySQL5InnoDBDialectopen-in-view: falseshow-sql: truehibernate:format_sql: trueddl-auto: create서버의 실행은 되지만와 같이 DB가 비정상적으로 작동합니다. 어느부분이 문제일까요?  

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]다음과 같이 오류가 나는데 어떻게 해야할까요 ?

선생님 안녕하세요좋은 강의를 만들어주신 덕분에 잘 보고 있습니다.조합으로 점화식을 도출해내신 것을 보고 궁금한 점이 생겨서 가르쳐주시면 감사하겠습니다. 강의 12분 540초에서5C3 = 4C2+4C3 점화식을 도출해내신 것을 보고제가 제대로 이해했는지 확인하기 위해 다른 시도를 해봤습니다. 위의 점화식은 5개의 데이터 중 4개를 이미 선택이 완료된 데이터로 가정했을 때 도출이 되는 식입니다. 그래서 저는 5개의 데이터 중 3개를 이미 선택이 완료된 데이터로 가정했을 때로 점화식을 도출해봤습니다.그래서D[5][3] = D[3][3] + (D[3][2] * 2) +D[3][1]라고 도출해봤는데, 혹시 제가 제대로 이해했는지 봐주시면 감사하겠습니다.