Difference between WAIT and BLOCKED thread states

by

A thread goes to wait state once it calls wait() on an Object. This is called Waiting State. Once a thread reaches waiting state, it will need to wait till some other thread calls notify() or notifyAll() on the object.

Once this thread is notified, it will not be runnable. It might be that other threads are also notified (using notifyAll()) or the first thread has not finished his work, so it is still blocked till it gets its chance. This is called Blocked State. A Blocked state will occur whenever a thread tries to acquire lock on object and some other thread is already holding the lock.

Once other threads have left and its this thread chance, it moves to Runnable state after that it is eligible pick up work based on JVM threading mechanism and moves to run state.

More Related Contents:

  1. How can I get my threaded program to print specific output
  2. Waiting for multiple SwingWorkers
  3. Why must wait() always be in synchronized block
  4. IllegalMonitorStateException on wait() call
  5. wait until all threads finish their work in java
  6. How to wait for a number of threads to complete?
  7. Java Wait for thread to finish
  8. Why are wait() and notify() declared in Java’s Object class?
  9. How can the wait() and notify() methods be called on Objects that are not threads?
  10. How to wait for all tasks in an ThreadPoolExecutor to finish without shutting down the Executor?
  11. Difference between “wait()” vs “sleep()” in Java
  12. Java : Does wait() release lock from synchronized block
  13. Difference between Synchronized block with wait/notify and without them?
  14. Concept behind putting wait(),notify() methods in Object class [duplicate]
  15. Inner class can access but not update values – AsyncTask
  16. Java Wait and Notify: IllegalMonitorStateException
  17. How to synchronize a static variable among threads running different instances of a class in Java?
  18. Why should wait() always be called inside a loop
  19. Java double checked locking
  20. How to scale threads according to CPU cores?
  21. Is ConcurrentHashMap totally safe?
  22. What is mutex and semaphore in Java ? What is the main difference?
  23. CountDownLatch vs. Semaphore
  24. Launch Firefox and Wait until it is Closed
  25. Programmatic deadlock detection in java
  26. Thread safety in Singleton
  27. WAITING at sun.misc.Unsafe.park(Native Method)
  28. Is there a good way to forcefully stop a Java thread?
  29. When may we need to use runOnUiThread in android application?
  30. How to set up multi-threading in Spring Batch?

Leave a Comment