本番の雰囲気に慣れておくことは、当日の実力発揮につながります。2026年の1z1-809試験に向けて、GoShikenのテストエンジンは制限時間付きの模擬試験モードを備え、Oracle Java SE 8 Programmer IIの出題形式を繰り返し体験できます。

Oracle 1z1-809 試験概要:

Oracle 1z1-809 試験シラバストピック:

1z1-809受験者からよく寄せられる質問

Oracle Java SE 8 Programmer II 認定 1z1-809 試験問題：

問題 #1

Given the definition of the Emp class:
public class Emp
private String eName;
private Integer eAge;
Emp(String eN, Integer eA) {
this.eName = eN;
this.eAge = eA;
}
public Integer getEAge () {return eAge;}
public String getEName () {return eName;}
}
and code fragment:
List<Emp>li = Arrays.asList(new Emp("Sam", 20), New Emp("John", 60), New Emp("Jim", 51)); Predicate<Emp> agVal = s -> s.getEAge() > 50;//line n1 li = li.stream().filter(agVal).collect(Collectors.toList()); Stream<String> names = li.stream()map.(Emp::getEName);//line n2 names.forEach(n -> System.out.print(n + " ")); What is the result?

A. A compilation error occurs at line n1.
B. Sam John Jim
C. John Jim
D. A compilation error occurs at line n2.

問題 #2

Assume customers.txt is accessible and contains multiple lines.
Which code fragment prints the contents of the customers.txt file?

A. Stream<Path> stream = Files.list (Paths.get ("customers.txt"));stream.forEach( c) -> System.out.println (c));
B. Stream<String> lines = Files.lines (Paths.get ("customers.txt"));lines.forEach( c) -> System.out.println (c));
C. Stream<Path> stream = Files.find (Paths.get ("customers.txt"));stream.forEach( c) -> System.out.println (c));
D. Stream<String> stream = Files.find (Paths.get ("customers.txt"));stream.forEach((String c) -> System.
out.println(c));

問題 #3

Given the content:

and the code fragment:

What is the result?

A. A compilation error occurs.
B. username = Entrez le nom d'utilisateurpassword = Entrez le mot de passe
C. The program prints nothing.
D. username = Enter User Namepassword = Enter Password

問題 #4

Which statement is true about the single abstract method of the java.util.function.Predicate interface?

A. It accepts one argument and returns void.
B. It accepts one argument and always produces a result of the same type as the argument.
C. It accepts one argument and returns boolean.
D. It accepts an argument and produces a result of any data type.

問題 #5

Given the code fragment:
LocalDate valentinesDay =LocalDate.of(2015, Month.FEBRUARY, 14);
LocalDate next15days = valentinesDay.plusDays (15);
LocalDate nextYear = next15days.plusYears(1); // line n1
System.out.println(nextYear);
What is the result?

A. A compilation error occurs at line n1.
B. 2016-03-01
C. A DateTimeException is thrown.
D. 2016-02-29

解説：