Java Programming

1

Java Fundamentals

Install the JDK and write your first programs. Variables, primitive types, operators, type conversion and console I/O.

2

Control Flow & Loops

Make decisions and repeat work: if/else, switch expressions, while, for and for-each loops, break and continue.

3

Methods, Arrays & Strings

Organise code into methods, work with single- and multi-dimensional arrays, and master the String and StringBuilder APIs...

4

Object-Oriented Programming Basics

Classes, objects, constructors, encapsulation, static members and packages — the foundations of OOP in Java.

5

Inheritance & Polymorphism

Reuse and extend behaviour with inheritance, method overriding, dynamic dispatch, casting and the Object class.

6

Exception Handling

Write robust code with try/catch/finally, checked vs unchecked exceptions, custom exceptions and try-with-resources.

1

Interfaces & Abstract Classes

Design to contracts with interfaces, abstract classes, default and static methods, and functional interfaces.

2

The Collections Framework

Lists, sets, maps, queues and deques — choosing and using the right data structure for the job.

3

Generics

Write type-safe, reusable code with generic classes and methods, bounded types, wildcards and type erasure.

4

Enums, Records & Sealed Types

Model fixed sets and immutable data with enums, records, sealed classes and pattern matching.

5

Lambdas & Functional Interfaces

Functional programming in Java: lambda expressions, the core functional interfaces and method references.

6

The Streams API

Process collections declaratively: map, filter, reduce, collectors, grouping and parallel streams.

1

Optional & Modern Java

Avoid null bugs with Optional, and use modern language features: var, text blocks, switch expressions and pattern matchi...

2

File I/O & NIO.2

Read and write files with the classic IO and modern NIO.2 APIs: Path, Files, streams, readers and serialization.

3

Date & Time API

Handle dates, times, durations, periods, formatting and time zones with the java.time API.

4

Concurrency Basics

Threads, Runnable, synchronization, the volatile keyword and atomic variables — concurrency from the ground up.

5

Concurrent Utilities

Higher-level concurrency: ExecutorService, Future, CompletableFuture, concurrent collections and locks.

6

JDBC & Databases

Connect Java to relational databases: DriverManager, PreparedStatement, ResultSet, transactions and pooling.

1

Design Patterns in Java

Apply the classic creational, structural and behavioral design patterns idiomatically in modern Java.

2

JVM Internals & Performance

How the JVM works: the memory model, garbage collection, the JIT compiler, profiling and tuning.

3

Testing with JUnit 5 & Mockito

Write reliable tests: JUnit 5 assertions and lifecycle, mocking with Mockito and test-driven development.

4

Build Tools & Modules

Manage real projects with Maven and Gradle, dependencies, and the Java Platform Module System (JPMS).

5

Networking & HTTP

Talk to the network: sockets, the modern java.net.http HttpClient, consuming REST APIs and JSON.

6

Capstone: A Real Java Application

Tie it all together by designing and building a complete, well-structured Java application end to end.