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O'Reilly Platform
book
함수형 프로그래밍 with 자바
by
벤 바이디히
,
허귀영
March 2024
Beginner to intermediate
528 pages
10h 48m
Korean
Hanbit Media, Inc.
Content preview from
함수형 프로그래밍 with 자바
144
PART 02
함수형 접근 방식
public record User
(
String username
,
boolean active
,
LocalDateTime lastLogin
)
{
//
바디
생략
}
var user
=
new User
("
ben
",
true
,
LocalDateTime
.
now
());
var username
=
user
.
username
();
접근자 메서드는 해당 필드의 값을 그대로 반환합니다. 접근자 메서드를 재정의할 수 있지
만, 다음 코드처럼 작성하는 것은 추천하지 않습니다.
public record User
(
String username
,
boolean active
,
LocalDateTime lastLogin
)
{
@
Override
public String username
()
{
if
(
this
.
username
==
null
)
{
return
"
n
/
a
";
}
return this
.
username
;
}
}
var user
=
new User
(
null
,
true
,
LocalDateTime
.
now
());
var username
=
user
.
username
();
//
=>
"
n
/
a
"
레코드는 불변한 데이터를 보관하도록 설계되었습니다. 따라서 그 데이터에 접근하면서 어
145
CHAPTER 05
레코드
떠한 처리나 판단을 하는 것은 코드 스멜
code
smell
로 간주될 ...
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Publisher Resources
ISBN: 9791169212175