距離開課大概還有（2013/01/16）大致上還有2個月，不過得在12月中通過資格考才行，雖然名稱為「大數據分析及系統設計班」，不過課程上主要有三大部分，分別是Java手機程式開發、Net Web程式開發及SQL資料庫管理、Python Web數據分析。課程上，後面兩個在學校都有修過課程，理論上應該是可以再複習一下，至於Java部分，可能就得要多花一些時間練習才行。稍微查了一下近年Java認證的考試內容，乖乖，和我當初接觸時已經有很大的不同，不過畢竟這是長時的訓練，至於能學到多少？可能還是得要入班後才能知道。目前有關Java認證的途徑如下表：

#圖片摘自恆逸Java系列認證介紹

由於沒考過Java認證考試，因此得需要從Exam Number: 1Z0-819開始才行，這看起來像是給自己挖了一個洞跳，不過計畫已經排定，只好還是要有些準備才行。其考試內容包涵了下面這些：

Working with Java data types

  • Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
  • Handle text using String and StringBuilder classes
  • Use local variable type inference, including as lambda parameters

Controlling Program Flow

  • Create and use loops, if/else, and switch statements

Java Object-Oriented Approach

  • Declare and instantiate Java objects including nested class objects, and explain objects’ lifecycles (including creation, dereferencing by reassignment, and garbage collection)
  • Define and use fields and methods, including instance, static and overloaded methods
  • Initialize objects and their members using instance and static initialiser statements and constructors
  • Understand variable scopes, apply encapsulation and make objects immutable
  • Create and use subclasses and superclasses, including abstract classes
  • Utilize polymorphism and casting to call methods, differentiate object type versus reference type
  • Create and use interfaces, identify functional interfaces, and utilize private, static, and default methods
  • Create and use enumerations

Exception Handling

  • Handle exceptions using try/catch/finally clauses, try-with-resource, and multi-catch statements
  • Create and use custom exceptions

Working with Arrays and Collections

  • Use generics, including wildcards
  • Use a Java array and List, Set, Map and Deque collections, including convenience methods
  • Sort collections and arrays using Comparator and Comparable interfaces

Working with Streams and Lambda expressions

  • Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
  • Use Java Streams to filter, transform and process data
  • Perform decomposition and reduction, including grouping and partitioning on sequential and parallel streams

Java Platform Module System

  • Deploy and execute modular applications, including automatic modules
  • Declare, use, and expose modules, including the use of services

Concurrency

  • Create worker threads using Runnable and Callable, and manage concurrency using an ExecutorService and java.util.concurrent API
  • Develop thread-safe code, using different locking mechanisms and java.util.concurrent API

Java I/O API

  • Read and write console and file data using I/O Streams
  • Implement serialization and deserialization techniques on Java objects
  • Handle file system objects using java.nio.file API

Secure Coding in Java SE Application

  • Develop code that mitigates security threats such as denial of service, code injection, input validation and ensure data integrity
  • Secure resource access including filesystems, manage policies and execute privileged code

Database Applications with JDBC

  • Connect to and perform database SQL operations, process query results using JDBC API

Localization

  • Implement Localization using Locale, resource bundles, and Java APIs to parse and format messages, dates, and numbers

Annotations

  • Create, apply, and process annotations

目前查詢Oracle最新的考試狀態，OCP Java SE 11 Programmer I 考試 1Z0-815 和 Programmer II 考試 1Z0-816 已於 2020 年 10 月 1 日停用，Oracle 推出了新的 Developer 考試 1Z0-819 來取代先前的考試。升級考試 1Z0-817 保持不變。我想，先到學校圖書館或校外查詢一下看是否有書籍可借，若沒有，再考慮購買的方式。