Multithreading in Java

 I. Introduction to Multithreading

A. What is multithreading?

B. Benefits of multithreading

C. Thread lifecycle


II. Creating Threads in Java

A. Implementing Runnable

B. Extending Thread

C. Starting and running threads

D. Thread class vs. Runnable interface


III. Thread Synchronization

A. Understanding thread interference and race conditions

B. Synchronized keyword

1. Synchronized blocks

2. Synchronized methods

C. Intrinsic locks and monitor objects

D. Object-level locking

E. class-level locking

F. Lock objects and explicit locks


IV. Thread Coordination and Communication

A. Thread communication basics

B. Wait and notify mechanisms

C. Inter-thread communication using wait/notify

D. Using conditions for more advanced thread coordination


V. Thread Safety and Immutable Objects

A. What is thread safety?

B. Immutable objects and their benefits

C. Creating immutable classes

D. Sharing immutable objects among threads


VI. Concurrent Collections

A. Introduction to concurrent collections

B. Concurrent lists, sets, and maps

C. Concurrent queues and blocking queues


VII. Executors and Thread Pools

A. Executor framework overview

B. Executors and ExecutorService

C. Thread pools and benefits

D. Submitting tasks to thread pools


VIII. Java Memory Model and Volatile Keyword

A. Understanding Java Memory Model

B. Visibility and ordering of shared variables

C. Volatile keyword and its usage


IX. Thread Interference and Synchronization Techniques

A. Common thread interference issues

B. Atomic variables and classes

C. ThreadLocal variables


X. Concurrent Programming Best Practices

A. Avoiding unnecessary synchronization

B. Minimizing shared mutable state

C. Writing thread-safe code

D. Dealing with deadlock and livelock


XI. Advanced Concurrency Concepts

A. Thread interruption and interruption policy

B. Thread-local variables

C. Read/Write locks

D. Phaser and cyclic barriers

E. CompletableFuture for asynchronous programming


XII. Concurrency Utilities in Java

A. Java 8 CompletableFuture

B. Java 8 Parallel Streams

C. Fork/Join framework

D. Java 9+ CompletableFuture enhancements