에러 발생

Main에서 실행 ➡️ 에러 발생

public class DividendsApplication {

	public static void main(String[] args) {

        YahooFinanceScraper scraper = new YahooFinanceScraper();
        var result = scraper.scrap(CompanyDto.builder().ticker("0").build());
        System.out.println(result);
    }
}

에러 코드

⬇️ 에러코드

"C:\Program Files\Java\jdk-17\bin\java.exe" -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2023.3.5\lib\idea_rt.jar=61803:C:\Program Files\JetBrains\IntelliJ IDEA 2023.3.5\bin" -Dfile.encoding=UTF-8 -classpath C:\Dividends\dividends\build\classes\java\main;C:\Dividends\dividends\build\resources\main;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.projectlombok\lombok\1.18.30\f195ee86e6c896ea47a1d39defbe20eb59cd149d\lombok-1.18.30.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-web\3.2.4\a74df12b71060da7c8e87f9a8c2ef4ea43fc8017\spring-boot-starter-web-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-data-jpa\3.2.4\d8c5f393d9b18d96021b3e02d80e4356c5cbe0f7\spring-boot-starter-data-jpa-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-security\3.2.4\a1b9f09832c42c6c079be67bf3e7989c54a338ff\spring-boot-starter-security-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.jsoup\jsoup\1.17.2\1e75b08d7019546a954f1e359477f916f537a34d\jsoup-1.17.2.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-json\3.2.4\ef3f72369ce7f6f7a7b02c0b23e60ef5bdf581b1\spring-boot-starter-json-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter\3.2.4\842cf7f0ed2ecfef3011f3191fc53c59ceed752\spring-boot-starter-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-tomcat\3.2.4\ffa632eeaaf1a4e807ec4bbcc1938f7d43096472\spring-boot-starter-tomcat-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-webmvc\6.1.5\92809fce136e0b662dc9325529443386ba5ec2c6\spring-webmvc-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-web\6.1.5\4f4e92cc52ee33260f1ee0cdc7b7a2f22d49708c\spring-web-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-aop\3.2.4\11aedc0a23c43947608f2122eed08eabe5e2994c\spring-boot-starter-aop-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-jdbc\3.2.4\7dd399e7ba19d62cae32be6e20edac37ff8fcbc0\spring-boot-starter-jdbc-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.hibernate.orm\hibernate-core\6.4.4.Final\5c9decb3c5a70bf7801d41fc32633416c26be069\hibernate-core-6.4.4.Final.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.data\spring-data-jpa\3.2.4\1932f90c487999575b57ad41986de96c8ebf5843\spring-data-jpa-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-aspects\6.1.5\202d9da55e24fec2eda80bbc3cd87fbefc0e1256\spring-aspects-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.security\spring-security-web\6.2.3\d560c082805438b749e4e9267916ca7f1f0a430d\spring-security-web-6.2.3.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.security\spring-security-config\6.2.3\281d0393358b963147b5499789ad211f7362d460\spring-security-config-6.2.3.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-aop\6.1.5\a4f596bd3c55b6cec93f0e2e7245dd0bab8afec3\spring-aop-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.datatype\jackson-datatype-jsr310\2.15.4\7de629770a4559db57128d35ccae7d2fddd35db3\jackson-datatype-jsr310-2.15.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.module\jackson-module-parameter-names\2.15.4\e654497a08359db2521b69b5f710e00836915d8c\jackson-module-parameter-names-2.15.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.datatype\jackson-datatype-jdk8\2.15.4\694777f182334a21bf1aeab1b04cc4398c801f3f\jackson-datatype-jdk8-2.15.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-databind\2.15.4\560309fc381f77d4d15c4a4cdaa0db5025c4fd13\jackson-databind-2.15.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-autoconfigure\3.2.4\b3f481aff8f0775f44d78399c804a8c52d75b971\spring-boot-autoconfigure-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot\3.2.4\ccb7cbb30dcf1d91dbbf20a3219a457eead46601\spring-boot-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-logging\3.2.4\32616f4a33ec0fda0c54aaa67ab10dc78df3fd78\spring-boot-starter-logging-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\jakarta.annotation\jakarta.annotation-api\2.1.1\48b9bda22b091b1f48b13af03fe36db3be6e1ae3\jakarta.annotation-api-2.1.1.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-core\6.1.5\6dae1b06ffacbb9abab636be2dbc6acd3b6e5d68\spring-core-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.yaml\snakeyaml\2.2\3af797a25458550a16bf89acc8e4ab2b7f2bfce0\snakeyaml-2.2.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.apache.tomcat.embed\tomcat-embed-websocket\10.1.19\adf4710fac2471236f8a466ca678cdf7e6a8257c\tomcat-embed-websocket-10.1.19.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.apache.tomcat.embed\tomcat-embed-core\10.1.19\3dbbca8acbd4dd6a137c3d6f934a2931512b42ce\tomcat-embed-core-10.1.19.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.apache.tomcat.embed\tomcat-embed-el\10.1.19\c61a582c391aca130884a5421deedfe1a96c7415\tomcat-embed-el-10.1.19.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-context\6.1.5\735d1bd7372d7c53e7b31b4a9c980ce2e0b26424\spring-context-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-beans\6.1.5\9ae967f467281c9bb977585ef4d5ea7351704d60\spring-beans-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-expression\6.1.5\7e21cb1c6bbef1509e12d485b75ffc61278d9fa7\spring-expression-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\io.micrometer\micrometer-observation\1.12.4\492deebbd9b8ab23f588428f66578e21af266e01\micrometer-observation-1.12.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.aspectj\aspectjweaver\1.9.21\beaabaea95c7f3330f415c72ee0ffe79b51d172f\aspectjweaver-1.9.21.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-jdbc\6.1.5\e8617dcddd3377c809b3e62c325fcb923163cb20\spring-jdbc-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.zaxxer\HikariCP\5.0.1\a74c7f0a37046846e88d54f7cb6ea6d565c65f9c\HikariCP-5.0.1.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\jakarta.persistence\jakarta.persistence-api\3.1.0\66901fa1c373c6aff65c13791cc11da72060a8d6\jakarta.persistence-api-3.1.0.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\jakarta.transaction\jakarta.transaction-api\2.0.1\51a520e3fae406abb84e2e1148e6746ce3f80a1a\jakarta.transaction-api-2.0.1.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-orm\6.1.5\d2dc2b996680fcc8ae5aea294f0ce6bda5577c7c\spring-orm-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.data\spring-data-commons\3.2.4\c934470822afb9f0751915b229d6fe28ff5e1ac2\spring-data-commons-3.2.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-tx\6.1.5\90e95f4c3e30f9ecaef6ba53186ed21afebba618\spring-tx-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.antlr\antlr4-runtime\4.13.0\5a02e48521624faaf5ff4d99afc88b01686af655\antlr4-runtime-4.13.0.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.slf4j\slf4j-api\2.0.12\48f109a2a6d8f446c794f3e3fa0d86df0cdfa312\slf4j-api-2.0.12.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.security\spring-security-core\6.2.3\52f2751381dcfad2c8cd2bfb4c7ca7b1adf2ea5e\spring-security-core-6.2.3.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-annotations\2.15.4\5223ea5a9bf52cdc9c5e537a0e52f2432eaf208b\jackson-annotations-2.15.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-core\2.15.4\aebe84b45360debad94f692a4074c6aceb535fa0\jackson-core-2.15.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-classic\1.4.14\d98bc162275134cdf1518774da4a2a17ef6fb94d\logback-classic-1.4.14.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-to-slf4j\2.21.1\d77b2ba81711ed596cd797cc2b5b5bd7409d841c\log4j-to-slf4j-2.21.1.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.slf4j\jul-to-slf4j\2.0.12\eb5f48f782b41cc881b0bf1fb4d88ae2ff6d5b93\jul-to-slf4j-2.0.12.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework\spring-jcl\6.1.5\896ae3519327731589c6e77521656b50ae32d5b3\spring-jcl-6.1.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\io.micrometer\micrometer-commons\1.12.4\a57f10c78956b38087f97beae66cf14cb8b08d34\micrometer-commons-1.12.4.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.springframework.security\spring-security-crypto\6.2.3\dbe4e299636951e00f18223a1794806d75000e7d\spring-security-crypto-6.2.3.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-core\1.4.14\4d3c2248219ac0effeb380ed4c5280a80bf395e8\logback-core-1.4.14.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-api\2.21.1\74c65e87b9ce1694a01524e192d7be989ba70486\log4j-api-2.21.1.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.h2database\h2\2.2.224\7bdade27d8cd197d9b5ce9dc251f41d2edc5f7ad\h2-2.2.224.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.jboss.logging\jboss-logging\3.5.3.Final\c88fc1d8a96d4c3491f55d4317458ccad53ca663\jboss-logging-3.5.3.Final.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.hibernate.common\hibernate-commons-annotations\6.0.6.Final\77a5f94b56d49508e0ee334751db5b78e5ccd50c\hibernate-commons-annotations-6.0.6.Final.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\io.smallrye\jandex\3.1.2\a6c1c89925c7df06242b03dddb353116ceb9584c\jandex-3.1.2.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.fasterxml\classmate\1.6.0\91affab6f84a2182fce5dd72a8d01bc14346dddd\classmate-1.6.0.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\net.bytebuddy\byte-buddy\1.14.12\6e37f743dc15a8d7a4feb3eb0025cbc612d5b9e1\byte-buddy-1.14.12.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.glassfish.jaxb\jaxb-runtime\4.0.5\ca84c2a7169b5293e232b9d00d1e4e36d4c3914a\jaxb-runtime-4.0.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\jakarta.xml.bind\jakarta.xml.bind-api\4.0.2\6cd5a999b834b63238005b7144136379dc36cad2\jakarta.xml.bind-api-4.0.2.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\jakarta.inject\jakarta.inject-api\2.0.1\4c28afe1991a941d7702fe1362c365f0a8641d1e\jakarta.inject-api-2.0.1.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.glassfish.jaxb\jaxb-core\4.0.5\7b4b11ea5542eea4ad55e1080b23be436795b3\jaxb-core-4.0.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\jakarta.activation\jakarta.activation-api\2.1.3\fa165bd70cda600368eee31555222776a46b881f\jakarta.activation-api-2.1.3.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.eclipse.angus\angus-activation\2.0.2\41f1e0ddd157c856926ed149ab837d110955a9fc\angus-activation-2.0.2.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\org.glassfish.jaxb\txw2\4.0.5\f36a4ef12120a9bb06d766d6a0e54b144fd7ed98\txw2-4.0.5.jar;C:\Users\sunej\.gradle\caches\modules-2\files-2.1\com.sun.istack\istack-commons-runtime\4.1.2\18ec117c85f3ba0ac65409136afa8e42bc74e739\istack-commons-runtime-4.1.2.jar zerobase.dividends.DividendsApplication
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266)
	at java.base/java.util.Objects.checkIndex(Objects.java:359)
	at java.base/java.util.ArrayList.get(ArrayList.java:427)
	at zerobase.dividends.scraper.YahooFinanceScraper.scrap(YahooFinanceScraper.java:35)
	at zerobase.dividends.DividendsApplication.main(DividendsApplication.java:22)

종료 코드 1(으)로 완료된 프로세스

= 스레드 "main"의 예외 java.lang.IndexOutOfBoundsException: 인덱스 0이 길이 0의 범위를 벗어났습니다.

🗣️ GPT와 대화

이러한 종류의 오류는 대개 배열 또는 리스트와 같은 자료구조에서 인덱스를 잘못 사용했을 때 발생합니다. 여기서는 배열의 길이가 0인 상태에서 인덱스 0에 접근하려고 하기 때문에 IndexOutOfBoundsException이 발생했습니다.

해결 방법은 배열을 생성하고, 원소를 추가한 후에 인덱스에 접근

💡 수정 사항

ticker 값을 "COKE"로 수정

public class DividendsApplication {

	public static void main(String[] args) {

        YahooFinanceScraper scraper = new YahooFinanceScraper();
        var result = scraper.scrap(CompanyDto.builder().ticker("COKE").build());
        System.out.println(result);
    }
}