Multithreading and Concurrency in java

Explore how threads enable multiple activities within a single process, how threads share memory and require synchronization, and how the JVM starts with a main thread and creates auxiliary threads.

Learn why and how to use threads in Java for responsive apps. See how background tasks, multi-processor utilization, and safe shared data rely on synchronization and volatile.

Explore two canonical ways to create threads in Java: extend the thread class or implement Runnable, with run methods and console output, and examine code snippets illustrating thread interactions.

Explore the Java thread lifecycle, from new to terminated, including runnable, running, blocked, waiting, and timed waiting states, and how the scheduler manages time slices and notifications.

Learn how Java uses monitors and intrinsic locks to synchronize access to shared resources, preventing race conditions with synchronized blocks and examples of coordinated thread printing.

Explore how semaphores regulate access to a shared resource via permits, using acquire and release, blocking threads until a permit frees, with Java’s concurrent package handling the implementation.

Explore how a semaphore limits shared connections among multiple threads, using a singleton connection, synchronized blocks, and finally blocks to ensure release even when exceptions occur.

Learn how interruption controls threads in Java, including deprecation of stop, using Thread.interrupted() and isInterrupted() to determine status, and handling InterruptedException from sleep or blocking calls.

Demonstrates interrupting a running thread, checking the interrupt flag, using sleep and InterruptedException, and joining threads to see how an interruption affects a time-consuming loop.

Explore reentrant lock in Java as a mutually exclusive lock with fairness, tryLock (with timeout), and interruptible locking, offering more control than synchronized.

Explore a java reentrant lock example with two threads incrementing a shared counter by 10000, producing a total of 20000, using try/finally unlock and a condition wait/notify mechanism.

Understand how deadlock occurs in programming and learn practical prevention techniques, including non-overlapping locks, lock ordering, lock timeouts, and single-thread strategies.

Explains a deadlock example with two threads and two locks, showing how acquiring resources in opposite order creates deadlock, and how a consistent lock acquisition order prevents it.

Learn how wait and notify coordinate threads in Java using synchronized blocks and intrinsic locks, pause with sleep, resume after user input via scanner, and understand join behavior.

Explore low-level synchronization in java through a producer and consumer on a shared list guarded by a synchronized block, using wait/notify to enforce a ten-element limit.

Demonstrates a low-level producer-consumer using a synchronized lock to coordinate a shared list, with size checks preventing overfill and blocking when empty.

Starvation occurs when a thread repeatedly loses access to a shared resource due to higher priority threads; the lecture explains mutex synchronization, infinite loops, and avoidance strategies.