Executor Framework Deep Dive | ThreadPool, Future & Callable | Java Full Course #56

In this Java multithreading video, we begin with a complete introduction to the Executor Framework in Java and understand why it is preferred over manually creating threads. This video explains the complete hierarchy of the Executor Framework, including the Executor interface, ExecutorService interface, and the important methods used to submit and manage tasks. We then take a deep dive into ThreadPoolExecutor, which is the core class behind most thread pools in Java. You will also learn how the Executors utility class helps us create ready-made thread pools such as FixedThreadPool, CachedThreadPool, SingleThreadExecutor, and ScheduledThreadPool. In this video, we cover: What is Executor Framework in Java? Why Executor Framework is needed Executor Framework hierarchy Executor interface explained ExecutorService interface and important methods submit(), execute(), shutdown() and related methods Deep dive into ThreadPoolExecutor Role of core pool size and maximum pool size Work queue inside a thread pool Executors utility class newFixedThreadPool() newCachedThreadPool() newSingleThreadExecutor() newScheduledThreadPool() ScheduledThreadPoolExecutor schedule() method scheduleWithFixedDelay() method BlockingQueue in ThreadPoolExecutor ArrayBlockingQueue LinkedBlockingQueue What happens when the queue becomes full? Rejection Policy in Java ThreadPoolExecutor This video is important for anyone who wants to understand Java concurrency, Java multithreading, thread pools, and how modern Java manages task execution efficiently using the Executor Framework. Why Learn Java? Java is one of the most powerful and widely used programming languages in the world. It is used in: Backend development Enterprise applications Android development Banking systems Large-scale distributed systems If you want to master Data Structures, Spring Boot, Microservices, or System Design, Java fundamentals are essential. Join Coder Army Whatsapp Group: https://whatsapp.com/channel/0029Va6H0tbHVvTbcuT99Y1f Join System Design Whatsapp Group: https://whatsapp.com/channel/0029VbBF1XKF1YlMyYuPM23s Code and Notes: Github : https://github.com/adityatandon15/Java-Full-Course We offer paid course on Dsa, web development, blockchain, system design and GenAI. Join our Paid Course: https://strikes.in/ Coder Army: https://coderarmy.in/#home Coder Army app: https://play.google.com/store/apps/details?id=com.rohit.negi Connect with Aditya Tandon Instagram : https://www.instagram.com/adityatandon2 LinkedIn : https://www.linkedin.com/in/adityatandon2 Twitter : https://x.com/adityatandon02 Timestamps: Java Executor Framework, ExecutorService Java, Executor Interface Java, ThreadPoolExecutor Java, Executors Utility Class, Java Thread Pool, FixedThreadPool Java, CachedThreadPool Java, SingleThreadExecutor Java, ScheduledThreadPoolExecutor Java, BlockingQueue Java, ArrayBlockingQueue, LinkedBlockingQueue, Rejection Policy Java, Java Multithreading, Java Concurrency, Java Full Course, Java Interview Questions.