JAVA OCP 21

This comprehensive learning path guides you through Oracle Certified Professional Java 21 (OCP 21) exam topics, from fundamental Java concepts to advanced features. Master primitives, object-oriented programming, collections, streams, concurrency, I/O, and more.

1. Handling Date, Time, Text, Numeric and Boolean Values

Master primitives, wrapper classes, text manipulation, and the Date-Time API.

1. Primitives, Wrapper Classes, and Expressions

2. Text Manipulation with String and StringBuilder

3. Date-Time API and Time Zones

2. Controlling Program Flow

Create program flow control constructs and manage execution flow.

1. Conditional Statements (if/else)

2. Switch Statements and Expressions

3. Loops and Control Flow

3. Using Object-Oriented Concepts in Java

Master classes, records, inheritance, polymorphism, interfaces, and enums.

1. Objects and Object Lifecycle

2. Classes, Records, Fields, and Methods

3. Encapsulation and Variable Scopes

4. Inheritance and Polymorphism

5. Interfaces and Functional Interfaces

6. Enum Types

4. Handling Exceptions

Handle exceptions effectively using various exception handling mechanisms.

1. Try-Catch-Finally Blocks

2. Try-With-Resources

3. Multi-Catch and Custom Exceptions

5. Working with Arrays and Collections

Create and manipulate arrays and collection types effectively.

1. Arrays

2. List Collections

3. Set Collections

4. Map Collections

5. Deque Collections and Sorting

6. Working with Streams and Lambda Expressions

Use streams and lambda expressions for functional programming.

1. Lambda Expressions and Functional Interfaces

2. Stream API Fundamentals

3. Advanced Stream Operations

7. Packaging and Deploying Java Code

Master Java modules, JARs, and deployment strategies.

1. Java Modules (JPMS)

2. Module Dependencies and Services

3. Compilation, JARs, and Runtime Images

8. Managing Concurrent Code Execution

Create and manage threads, executors, and concurrent collections.

1. Threads and Thread Lifecycle

2. Executor Services and Concurrent API

3. Thread Safety and Locking Mechanisms

4. Concurrent Collections and Parallel Streams

9. Using Java I/O API

Read and write data using I/O streams and NIO.2 API.

1. I/O Streams

2. Serialization and Deserialization

3. NIO.2 File API

10. Implementing Localization

Implement internationalization and localization features.

1. Locales and Resource Bundles

2. Formatting Messages, Dates, Times, and Numbers

Additional Topics

Essential topics expected for OCP 21 certification.

1. Java Logging API

2. Java Annotations

3. Generics and Wildcards

OCP 21 Exam Concepts

Primitives & Wrappers

Date-Time API

OOP

Records

Sealed Types

Pattern Matching

Exceptions

Collections

Lambda

Streams

Modules

Virtual Threads

Concurrency

I/O API

Localization

Annotations

Generics

Logging

OCP 21 exam concepts and topics

Each module contains practical exercises, code examples, and hands-on tutorials to help you master Java 21 features and prepare effectively for the OCP 21 certification exam.