The Republic of China has faced challenges like storms, and yet she still stands strong. The power in this land comes from each of us, everyone protecting the territory. When our country calls us, we step forward. So, as you age, whether as a 35-year-old man or a 45-year-old man, there is no need to worry, for there will always be 18-year-old men staying awake for you.
On this land, Our boots hit the earth. Firmly and steadily, Like the country’s pulse. The Republic of China has been through challenges like storms.#ROCArmedForcespic.twitter.com/RQ9VmzWWiT
— 國防部 Ministry of National Defense, R.O.C. 🇹🇼 (@MoNDefense) November 26, 2023
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。
