1. Multithreading & Concurrency

Java's multithreading capabilities allow concurrent execution of tasks. Key concepts include:

  • Thread Safety: Ensuring data consistency in multi-threaded environments
  • Synchronization: Using synchronized keywords or blocks
  • Concurrent Collections: ConcurrentHashMap, CopyOnWriteArrayList
  • Thread Pools: Managing thread execution with ExecutorService
Thread Safety

For deeper insights into thread management, check our Java OOP Concepts tutorial.

2. Reflection Mechanism

Reflection enables runtime inspection of classes and objects. Use cases:

  • Dynamic class loading with Class.forName()
  • Accessing private fields/methods
  • Creating instances via Class.newInstance()
Reflection Mechanism

Explore practical examples of reflection in Java Core Features.

3. Generics & Type Safety

Generics provide type safety at compile time. Examples:

  • Generic classes: class Box<T>
  • Wildcard types: List<? extends Number>
  • Type erasure mechanism
Generic Types

Learn more about generics in Java Collections Framework.

4. Annotations & Metadata

Annotations add metadata to code elements. Types include:

  • Built-in annotations: @Override, @Deprecated
  • Custom annotations: Define with @interface
  • Runtime retention: @Retention(RUNTIME)
Annotations Usage

Dive into annotation processing with Java Compilation.

5. JVM Optimization Techniques

Improve application performance through:

  • Garbage collection tuning (G1, ZGC, Shenandoah)
  • Memory management with heap configuration
  • Profiling tools like VisualVM
JVM Tuning

For foundational knowledge, review Java Basics.

6. Design Patterns in Java

Common patterns include:

  • Singleton: Ensures single instance creation
  • Factory Method: Defines object creation interface
  • Observer: Implements event handling system
Design Patterns

Expand your understanding of design patterns in Java Advanced Patterns.