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CertificationsOracle1Z0-809
Oracle专业级其他

Java SE 8 Programmer II (1Z0-809)

Oracle Java SE 8 Programmer II exam prep covering generics, collections, lambda expressions, streams, concurrency, I/O, JDBC, localization, and advanced language features. Includes 123 practice questions with explanations, a 150-minute exam format, and a 65% passing score.

Try the first chapter freePractice questions
85
Official exam questions
150 min
Exam duration
65/100
Passing score
JR ACADEMY / CERTIFICATION PREP

JR Academy practice bank

123practice questions
Build your foundation7 learning chapters
Practice with purposeFocused practice · answer explanations
Test your readinessMock exams · review

123 practice questions available

OverviewLearning pathFAQReviews
01

Understand the certification

Java SE 8 OCP II 是 Java 开发岗位最硬核的语言认证,但 SE 8 版本已过时,新考生建议直接考 1Z0-830(SE 21)。

Java SE 8 Programmer II(1Z0-809)是 Oracle Certified Professional(OCP)认证的第二阶段考试,要求先通过 1Z0-808(OCA)。85 题 150 分钟,65% 通过,考试费 $245。这不是"写 Hello World"级别的考试 — 它考的是 Lambda 表达式、Stream API、并发包(java.util.concurrent)、NIO.2 文件操作这些 Java 8 引入的核心特性。

考试难度集中在两个方面:一是 泛型和集合框架的边界条件(wildcard ? extends/super 的区别、类型擦除的行为),二是 多线程并发的正确性(CyclicBarrier vs CountDownLatch、Fork/Join 框架、线程池的选择)。很多 3-5 年经验的 Java 开发者第一次模考也只拿 50-60%。

Oracle 在 2025 年推出了 Java SE 21 版本的 OCP(1Z0-830),SE 8 版本虽然还能考,但市场认可度已开始下降。如果你纯粹为了职业发展,建议直接考 SE 21 版本。但如果你的项目还在用 Java 8(大量金融系统仍是 Java 8),1Z0-809 的知识点直接对口。

Exam at a glance

Exam code
1Z0-809
Provider
Oracle
Format
Single choice / Multiple select
Language
English / 日本語
Validity
No expiry
Exam fee
$245
Official certification page

Skills in focus

Oracle 技术数据库管理系统架构性能优化故障排除

Learning outcomes

  • Prepare for the Oracle 1Z0-809 exam with a realistic study path
  • Use advanced Java language features with more confidence
  • Build the Java depth needed for higher-level development roles
  • Strengthen your position for the Oracle Java certification track

Who this is for

  • Java developers who already know the basics and want the next certification step
  • IT professionals preparing for the Oracle Java SE 8 Programmer II exam
  • Developers who want stronger skills in streams, concurrency, and the Java API
  • Anyone moving from Java fundamentals into more advanced Java development

Before you start

  • You should already be comfortable with Java SE 8 basics
  • Hands-on coding practice with classes, exceptions, and collections is recommended
  • The course assumes you are ready for more advanced Java topics
02

Your learning path

7 chapters

011Z0-809 Exam Overview and Study PlanFree02Generics and CollectionsFree03Lambda Expressions and Functional Programming70 min04Stream API and Pipeline Operations80 min05Concurrency and Thread Management90 min06I/O, JDBC, and Localization100 min
View the full learning path

Plan your preparation

Learning hours
60h
With relevant experience
5-7 weeks
Starting from scratch
10-14 weeks
Daily study
1.5-2h

Included in your preparation

  • 123 practice questions covering the advanced Java SE 8 topics
  • Strong coverage of generics, collections, lambda expressions, streams, and concurrency
  • Mock exam aligned to the official 85-question, 150-minute format
  • Clear explanations that focus on language behaviour and exam traps
  • Study flow built for candidates already past the Java basics stage

1. 第一阶段:Java 8 新特性突击(2 周)

集中攻克 Lambda、Stream API、Optional、Date/Time API(java.time)。每个特性写 10+ 个小程序练手,重点理解 Stream 的 lazy evaluation 和 terminal operation 的区别。

2. 第二阶段:并发和泛型深度学习(2-3 周)

这是 1Z0-809 的"地狱区域"。把 java.util.concurrent 包里的 ExecutorService、Future、CyclicBarrier、CountDownLatch、ReentrantLock 全部写 demo 跑一遍。泛型部分重点搞清楚 PECS 原则(Producer Extends, Consumer Super)。

3. 第三阶段:按章节刷题 + 查漏补缺(2-3 周)

每天 30-40 题,做完对答案。错题整理到 Notion,按知识点分类。NIO.2 文件操作、JDBC 基础、异常处理的链式调用这些容易忽略的小章节也要覆盖到。

03

Career value

OCP 在 Java 岗位招聘中的实际作用

Oracle OCP 认证在金融、保险、电信这类 Java 重度使用行业的简历筛选里有明确加分。澳洲四大银行(CBA、NAB、ANZ、Westpac)的 Java 岗位 JD 里,约 30% 提到 "Oracle Certified" 或 "OCP preferred"。

但 OCP 不是万能的:前端转 Java 的人不建议考这个 — 它不教你 Spring Boot、微服务、Docker 这些实际工作中用得最多的东西。OCP 考的是语言层面的细节(泛型、并发、IO),对已经在写 Java 的人是锦上添花,对新人来说性价比不如直接学 Spring 生态。

适合考的人:已经有 1-2 年 Java 开发经验,想在简历上加一个"语言能力背书"的工程师。不适合:完全没写过 Java 的转行者。

Java DeveloperBackend EngineerJava 高级开发工程师后端架构师
澳洲
AUD 95,000 – 140,000
美国
USD 110,000 – 170,000
中国
CNY 250,000 – 500,000

Preparation tips

  • **Enthuware 模考是必备** — $12 买一套,题目风格和真题最接近,比 Whizlabs 和 Udemy 的都靠谱。
  • **150 分钟 85 题,平均 1.76 分钟/题** — 遇到长代码题先看选项再看代码,排除法效率更高。
  • **多选题策略** — 如果不确定选几个,默认选 2-3 个最有把握的,不要贪多。
  • **代码输出题先找编译错误** — 如果代码有编译问题,直接选"Compilation fails",不用分析运行逻辑。
  • **考前一周只做全真模考** — 不要再学新知识,把错题过一遍,保持手感。

Common mistakes

  • **忽略编译错误选项** — 约 15% 的题目正确答案是"编译错误",要仔细看泛型边界和方法签名是否匹配。
  • **Stream API 的 lazy evaluation 搞不清** — filter().map() 不会立刻执行,只有遇到 terminal operation(collect/forEach/reduce)才触发。
  • **并发题只背 API 不理解语义** — CyclicBarrier 可重用、CountDownLatch 一次性,这种区别必须理解到位。
  • **日期时间 API 用错类** — LocalDate 没有时间、LocalDateTime 没有时区、ZonedDateTime 才有时区,考试经常混着考。
  • **多选题漏选** — 1Z0-809 多选题不告诉你选几个,漏选一个整题零分。
04

Before you register

How difficult is the 1Z0-809 exam?

The 1Z0-809 exam contains approximately 85 questions with a 150-minute time limit, requiring a passing score of 65%. We recommend systematic study combined with extensive practice questions to prepare.

What is the exam fee and validity period?

The 1Z0-809 exam costs $245 USD. Oracle certifications typically do not have a fixed expiration date, but it is recommended to update regularly to stay current with the latest technologies.

How do I register for the exam?

You can register through the Oracle University website or Pearson VUE test centers. Both online proctored and in-person testing options are available.

05

Learner experiences

Loading reviews…

并发那部分比我预期难很多,Fork/Join 框架实际工作中几乎没用过但考试考得很细。建议把 Enthuware 的模考做 3 遍以上,题库质量比 Whizlabs 好。

Z. Chen

Java 后端 4 年 · 78/100 · 6 weeks

险过。最大的教训是不能只看书不写代码,Stream API 的 flatMap 和 reduce 这些东西必须自己写才能理解。光背 API 签名没用,考试给你一段代码问输出结果。

应届 CS 毕业生

刚入职 Java 岗 · 69/100 · 12 weeks

06

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Start with the first chapter.

2 free chapters · Full preparation from $39

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