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- Localization. In particular how to read and set the locale by using the Locale object, to create and read a Properties file, and to build a recourse bundle for each locale.
- NIO.2, Path Interface, and Files Class.
- Exceptions and Assertions. In other words, how to use try-catch and throw statements, alongside creating custom exceptions and Auto-closeable resources.
- Java Concurrency. The candidates must be able to create worker threads, as well as to use parallel Fork/Join Framework and parallel Streams.
- I/O Fundamentals. It means the skill of reading and writing data from the console.
- Advanced Class Design. Specifically, candidates must demonstrate skills in how to implement encapsulation, polymorphism, and inheritance.
- Stream API. It means the code development that uses optional class, Stream data, and calculation methods in addition to sorting a collection using Stream API.
- Generics and Collections. This allows the candidate to create and use a generic class as well as ArrayList, TreeSet, TreeMap, and ArrayDeque objects.
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Oracle 1z0-809 Korean Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Java Stream API | 15% | - Filter, map, and process streams - Use terminal operations: collect, reduce, count - Describe Stream interface and pipeline - Work with Optional class |
| Topic 2: Lambda Expressions and Functional Interfaces | 15% | - Use primitive and binary variants of functional interfaces - Create and use lambda expressions - Use method references - Use built-in functional interfaces: Predicate, Consumer, Function, Supplier |
| Topic 3: Java Class Design | 15% | - Implement encapsulation - Implement inheritance including visibility modifiers and composition - Use static keyword in blocks, variables, methods, classes - Create singleton and immutable classes - Implement polymorphism - Override hashCode, equals, and toString methods |
| Topic 4: Advanced Java Class Design | 10% | - Use final keyword - Create inner classes: static, local, nested, anonymous - Use abstract classes and methods - Use enumerated types |
| Topic 5: Exceptions and Assertions | 8% | - Use try-with-resources - Use assertions - Use try-catch, multi-catch, finally - Create custom exceptions |
| Topic 6: Concurrency | 12% | - Create threads: Thread class, Runnable, ExecutorService - Use java.util.concurrent components - Control thread lifecycle and synchronization - Use Executors, Callable, Future |
| Topic 7: Localization | 5% | - Work with resource bundles - Format numbers, dates, messages - Use Locale class |
| Topic 8: Generics and Collections | 15% | - Analyze type safety and type erasure - Use Collections Framework: List, Set, Map, Queue - Use generic classes, interfaces, and methods - Sort and search collections |
| Topic 9: Java SE 8 Date/Time API | 7% | - Format and parse dates/times - Use LocalDate, LocalTime, LocalDateTime, Instant - Work with Period, Duration, time zones |
| Topic 10: JDBC | 5% | - Connect to database - Process resultsets - Execute queries and updates |
| Topic 11: Java I/O and NIO.2 | 8% | - Stream operations on files - Use Path, Files, FileSystem API - Read/write with java.io API |
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