Optional is a container object which may or may not contain a non-null value . You must import java. util package to use this class. If a value is present, isPresent() will return true and get() will return the value.19 Şub 2022
Optional is a container object which may or may not contain a non-null value . You must import java. util package to use this class. If a value is present, isPresent() will return true and get() will return the value.19 Şub 2022