java import java.util.Optional; public class OptionalExample { public static void main(String[] args) { Optional<String> optionalValue = Optional.ofNullable("Hello, World!"); optionalValue.ifPresentOrElse( value -> System.out.println("Value is present: " + value), () -> Sy...
import java.util.Optional; public class IfPresentOrElseExample { public static void main(String[] args) { Optional<String> optionalValue = Optional.ofNullable("Hello, World!"); // 使用 ifPresentOrElse 方法打印 value optionalValue.ifPresent(value -> System.out.println("Value: " + value)); /...
The following examples show how to use java.util.Optional#ifPresentOrElse() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on...
isPresent() Optional 객체 내부의 값이 존재하는지 확인하는 메서드 값이 존재하면 true를 반환하고, 값이 없으면 false를 반환 import java.util.Optional; public class OptionalExample {
Exampleimport java.util.Optional; import java.util.concurrent.atomic.AtomicInteger; public class IfPresentOrElseMethodTest { public static void main(String args[]) { optionalIsPresent(); optionalIsEmpty(); } private static void optionalIsPresent() { ...
publicinterfaceCourseRepositoryextendsCrudRepository<Course,Integer>{Optional<Course>findByName(String name); @Query("Select new com.example.university.view.CourseView" + "(c.name, c.instructor.member.lastName, c.department.name) from Course c where c.name=?1")Optional<CourseView>getCourseViewByNam...
[Java Spring Data] Optional<> query response, orElse, orElseThrow, ifPresent Repo: AI检测代码解析 publicinterfaceCourseRepositoryextendsCrudRepository<Course,Integer>{Optional<Course>findByName(String name); @Query("Select new com.example.university.view.CourseView" +...