인프런 커뮤니티 질문&답변

메시지 내용입니다.

C:\Users\hwang\.jdks\azul-18.0.2\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2022.2\lib\idea_rt.jar=64183:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2022.2\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\hwang\IdeaProjects\ex1-jpa-basic\target\classes;C:\Users\hwang\.m2\repository\javax\xml\bind\jaxb-api\2.3.0\jaxb-api-2.3.0.jar;C:\Users\hwang\.m2\repository\org\hibernate\hibernate-entitymanager\5.3.10.Final\hibernate-entitymanager-5.3.10.Final.jar;C:\Users\hwang\.m2\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;C:\Users\hwang\.m2\repository\org\hibernate\hibernate-core\5.3.10.Final\hibernate-core-5.3.10.Final.jar;C:\Users\hwang\.m2\repository\org\javassist\javassist\3.23.2-GA\javassist-3.23.2-GA.jar;C:\Users\hwang\.m2\repository\antlr\antlr\2.7.7\antlr-2.7.7.jar;C:\Users\hwang\.m2\repository\org\jboss\jandex\2.0.5.Final\jandex-2.0.5.Final.jar;C:\Users\hwang\.m2\repository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;C:\Users\hwang\.m2\repository\javax\activation\javax.activation-api\1.2.0\javax.activation-api-1.2.0.jar;C:\Users\hwang\.m2\repository\org\dom4j\dom4j\2.1.1\dom4j-2.1.1.jar;C:\Users\hwang\.m2\repository\org\hibernate\common\hibernate-commons-annotations\5.0.4.Final\hibernate-commons-annotations-5.0.4.Final.jar;C:\Users\hwang\.m2\repository\javax\persistence\javax.persistence-api\2.2\javax.persistence-api-2.2.jar;C:\Users\hwang\.m2\repository\net\bytebuddy\byte-buddy\1.9.5\byte-buddy-1.9.5.jar;C:\Users\hwang\.m2\repository\org\jboss\spec\javax\transaction\jboss-transaction-api_1.2_spec\1.1.1.Final\jboss-transaction-api_1.2_spec-1.1.1.Final.jar;C:\Users\hwang\.m2\repository\com\h2database\h2\1.4.199\h2-1.4.199.jar hellojpa.JpaMain

1�� 28, 2023 10:42:24 ���� org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformation

INFO: HHH000204: Processing PersistenceUnitInfo [

name: hello

...]

1�� 28, 2023 10:42:25 ���� org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {5.3.10.Final}

1�� 28, 2023 10:42:25 ���� org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

1�� 28, 2023 10:42:25 ���� org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {5.0.4.Final}

1�� 28, 2023 10:42:25 ���� org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)

1�� 28, 2023 10:42:25 ���� org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH10001005: using driver [org.h2.Driver] at URL [jdbc:h2:tcp://localhost/~/test]

1�� 28, 2023 10:42:25 ���� org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH10001001: Connection properties: {user=sa}

1�� 28, 2023 10:42:25 ���� org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH10001003: Autocommit mode: false

1�� 28, 2023 10:42:25 ���� org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections <init>

INFO: HHH000115: Hibernate connection pool size: 20 (min=1)

1�� 28, 2023 10:42:25 ���� org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.H2Dialect

Hibernate:

select

member0_.id as id1_0_0_,

member0_.name as name2_0_0_

from

Member member0_

where

member0_.id=?

java.lang.NullPointerException: Cannot invoke "hellojpa.Member.setName(String)" because "findMember" is null

at hellojpa.JpaMain.main(JpaMain.java:20)

1�� 28, 2023 10:42:26 ���� org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop

INFO: HHH10001008: Cleaning up connection pool [jdbc:h2:tcp://localhost/~/test]

Process finished with exit code 0

말씀하신 코드 추가해서 메시지 내용을 복사해서 올립니다.
감사합니다

java.lang.NullPointerException: Cannot invoke "hellojpa.Member.setName(String)" because "findMember" is null

findMember가 null이라는 것으로 보아

em.find(Member.class, 1L); <- ID가 1인 데이터가 h2 DB에 없는 것으로 예상이 되는데

h2를 접속해서 Member데이터를 select쿼리를 날려 확인해주세요.

감사합니다 잘 해결되었습니다 member table을 다시 만들어서 쿼리를 날렸더니 잘 해결 되었습니다!