[Spring MVC] 진웨이얀 미션 제출합니다. #505
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juanxiu
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Oct 6, 2025
| package roomescape; | ||
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| public record Reservation(long id, String name, String date, String time) {} No newline at end of file |
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자바엔 long과 Long 타입이 있습니다. 이 글 을 참고하여 둘의 차이점과 각각 어느 때에 쓰이는지 알아보면 좋을 것 같습니다.
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자바엔 long과 Long 타입이 있습니다. 이 글 을 참고하여 둘의 차이점과 각각 어느 때에 쓰이는지 알아보면 좋을 것 같습니다.
감사합니다!! 찾아 봤는데 long은 저희가 늘 쓰는 primitive type이라 int의 범위를 초과하는 숫자를 다룰 때 쓰고, Long은 long을 객체 형태로 감싼 wrapper 클래스라서 다양한 메서드(parseLong())등을 사용하고 싶을 때 쓰는것 같습니다.
| package roomescape; | ||
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| public record Reservation(long id, String name, String date, String time) {} No newline at end of file |
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record 를 사용하셨네요! class 와 record 의 차이점이 무엇인가요? record를 사용하면 장점이 무엇인가요?
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class는 저희가 일반적으로 사용하는 data와 operations모두 가질 수 있고, 생성자, getter등은 직접 구현해야되는데 record 같은 경우에는 스프링을 배울 때 처음 알았던 불변 data 저장 할 수 있는 기능인데 생성자, getter등을 자동으로 생성해줘서 더 간결해진다는 장점이 있습니다.
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