Advanced Java Notes (PDF)

While having a strong grasp of Java fundamentals is important, preparing for senior developer roles also requires in-depth knowledge of advanced Java concepts. This blog post covers some key advanced topics in Java that you should study and understand to take your skills to the next level.

Multithreading in Java

Understanding thread states like new, runnable, blocked etc
Implementing Runnable and extending Thread class
Using thread pooling with ExecutorService
Synchronization using synchronized keyword, locks and monitors
Deadlocks – how they occur and how to prevent
Volatile keyword in Java

Java Collections Framework

Sorting and searching algorithms like merge sort, quick sort etc
Internal working of HashMap, LinkedHashMap and TreeMap
Using NavigableMap and NavigableSet
Understanding working of ConcurrentHashMap
BlockingQueue and LinkedBlockingQueue

Java IO

Streams vs readers/writers
File, FileInputStream, FileOutputStream classes
Serialization – externalizable vs serializable
Working with Properties file
Byte streams vs character streams

JVM Fundamentals

Class loading process and loaders
Understanding method area and heap space
Java memory model
Garbage collection algorithms
Tracking memory leaks

Design Patterns

Most commonly used creational, structural and behavioral patterns
When to use singleton, factory, builder patterns
Implementing decorator, observer, strategy patterns
Understanding MVC, DAO patterns

Language Fundamentals

Annotations in Java
Varargs and lambda expressions
Stream API, groupingBy, filtering
Java NIO vs IO
Regular expressions
Reflection and proxies

Spring Framework

Dependency Injection
Aspect Oriented Programming (AOP)
MVC architecture in Spring
Spring Data JPA
Spring Boot and microservices

I hope these advanced Java concepts help you increase your expertise and prepare for senior roles. Let me know if any area needs further elaboration or examples.

Conclusion

Let’s dive in and explore the world of Advanced Java Notes!

How to create and destroy objects
Using methods common to all objects
How to Design Classes and Interfaces
How and when to use Generics
How and when to use Enums and Annotations
How to write methods efficiently
General programming guidelines
How and when to use Exceptions
Concurrency best practices
Built-in Serialization techniques
How to use Reflection effectively
Dynamic languages support
Java Compiler API
Java Annotation Processors
Java Agents