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IntermediateProgramming Languages

~28 Hours 16 Lessons100% Free

Java 21 Enterprise Architecture & Spring Boot

Object-oriented programming, JVM internals, multithreading, and Spring Boot microservices.

Master Java 21+: Object-Oriented Programming (OOP), JVM architecture, memory management, garbage collection, Collections framework, Generics, Concurrency & Virtual Threads, Spring Boot microservices, and Maven.

What You Will Learn

Java 21 Syntax, Records & Pattern Matching
Object-Oriented Design & Design Patterns (Singleton, Factory)
Collections Framework (ArrayList, HashMap, ConcurrentHashMap)
JVM Memory & Garbage Collection Tuning
Spring Boot Dependency Injection & REST Microservices

Prerequisites & Environment

Programming Fundamentals

Complete Course Curriculum (16 Modules)

16 In-Depth Lessons

Module 01

Module 1: Java Overview & JVM Architecture

1 Lessons

Bytecode compilation, JVM stack vs heap, and public static void main.

1.1Java Introduction & JVM Execution Lifecycle

Module 02

Module 2: Data Types, Variables & Operators

1 Lessons

Primitive types (byte, int, long, double), wrapper classes, and BigDecimal for financial calculations.

2.1Primitives, Wrapper Classes & BigDecimal

Module 03

Module 3: Control Structures & Flow

1 Lessons

if/else, switch expressions (Java 14+), for/while loops, and enhanced for-each.

3.1Enhanced Switch Expressions & Iteration

Module 04

Module 4: Object-Oriented Programming (Classes & Objects)

1 Lessons

Constructors, getters/setters, encapsulation, static members, and packages.

4.1Classes, Constructors & Encapsulation

Module 05

Module 5: Inheritance, Polymorphism & Abstract Classes

1 Lessons

Extending classes (extends), super(), method overriding (@Override), and abstract classes.

5.1Inheritance, Dynamic Polymorphism & @Override

Module 06

Module 6: Interfaces, Records & Sealed Classes

1 Lessons

Interface contracts, default methods, Java 21 Records, and sealed class hierarchies.

6.1Interfaces, Default Methods & Sealed Classes

Module 07

Module 7: Java Collections Framework

1 Lessons

List (ArrayList, LinkedList), Set (HashSet, TreeSet), and Map (HashMap, ConcurrentHashMap).

7.1Collections Framework (ArrayList, HashSet, HashMap)

Module 08

Module 8: Generics & Type Constraints

1 Lessons

Generic classes <T>, bounded type parameters (<T extends Comparable>), and wildcards (? extends Number).

8.1Generics (<T>), Type Erasure & Wildcards (? extends)

Module 09

Module 9: Streams API & Functional Programming

1 Lessons

Stream pipelines, map, filter, reduce, collect (Collectors.toList), and parallel streams.

9.1The Java Streams API & Lambda Expressions

Module 10

Module 10: Concurrency, Threads & Virtual Threads (Project Loom)

1 Lessons

Thread synchronization, ExecutorService, CompletableFuture, and Java 21 Virtual Threads.

10.1Java 21 Virtual Threads & Concurrency

Module 11

Module 11: Spring Boot Microservices Architecture

1 Lessons

Spring Boot 3, Dependency Injection, Spring Data JPA, and secure REST APIs.

11.1Spring Boot 3 REST Microservices & Dependency Injection

Module 12

Module 12: JVM Memory: ZGC, Shenandoah & Ultra-Low-Latency GC

1 Lessons

Master JVM memory management: Generational ZGC, Shenandoah colored pointers, load barriers, and sub-millisecond GC pauses.

12.1JVM Garbage Collection: Generational ZGC & Shenandoah

Module 13

Module 13: Project Loom: Virtual Threads & Carrier Pool Internals

1 Lessons

Master Java 21+ Project Loom: millions of Virtual Threads, continuation frames, unpinning carrier threads, and Structured Concurrency.

13.1Project Loom: Virtual Threads & Continuation Mechanics

Module 14

Module 14: Project Panama: Foreign Function & Memory API (FFM)

1 Lessons

Replace legacy JNI with Project Panama's type-safe Foreign Function and Memory (FFM) API for direct C/C++ interop.

14.1Project Panama: Foreign Function & Memory (FFM) API

Module 15

Module 15: Bytecode Engineering with ASM, ByteBuddy & ClassLoaders

1 Lessons

Manipulate JVM bytecode dynamically: Java Agent instrumentation, ASM visitor pipelines, and custom ClassLoaders.

15.1JVM Bytecode Engineering: ASM & ByteBuddy Instrumentation

Module 16

Module 16: GraalVM Native Image: AOT Compilation & Static Analysis

1 Lessons

Build instant-startup native binaries with GraalVM Ahead-Of-Time (AOT) compilation, Closed-World Static Analysis, and reflection metadata.

16.1GraalVM Native Image & Ahead-Of-Time (AOT) Compilation