UserService.java

Java•上級

Explorer

C40

C++40

C#40

Dart40

Go40

Java

初級10

中級10

上級10

UserService.java

StreamProcessor.java

GenericClass.java

LambdaExample.java

TryCatchResource.java

EnumPattern.java

MethodReference.java

Annotation.java

SwitchExpression.java

InterfaceDefault.java

エキスパート5

マスター5

JavaScript40

Kotlin40

Objective-C40

Perl40

PHP40

Python40

R40

Ruby40

Rust40

Shell40

Swift40

TypeScript40

UserService.java

Click to focus

1

2

3

4

5

public Optional<User> findById(Long id) {↵

return repository.findById(id)↵

.filter(u -> u.isActive())↵

.orElseThrow(() -> new NotFoundException());↵

}

0WPM•0%•0:00•0/163(0%)|Ln 1, Col 1

UTF-8•Java

関連する練習問題

StreamProcessor.java GenericClass.java LambdaExample.java TryCatchResource.java EnumPattern.java MethodReference.java